1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef8e0b1b6be7da2f528e02c180b93cabbb3a26549a835ea74381f39fbfe359. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcde2d59-ed60-4e48-b817-1c10d41db29c.json and https://artists.proofprofile.net/proofs/artist/dcde2d59-ed60-4e48-b817-1c10d41db29c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaad0a429c8d165bdaee4432d66f2675aa264caea34770be153b1682054dcf8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cf617ea40ee61d0156aa774e9ec8a39a0ca6b47e317d05785015378018d715. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a25ef2350f701db3c3325a70c10ce515f07c6e81c75478dde61e8a88989322. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64325793f24f8503f5578e728a4ae1395e01f35f46f19273770e29acdbade163. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee71efe6ca648827607b4a65f0e28894985dbb76aaad7c09a527fd39cdf9b170. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0d25febc9534ad1ee008e291d7f16bff12edcfed5061c47e53f3ebd092dc02. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280108.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd999c3f23d312b26973069eb394f18611913911a5a28a77f004cd34530fbd3ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e502ea8ebf6e6310df89907bc467f4dbf8f7e2bac20cbfb3c45439bec39bb8a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40686e2c3ac7d3a451374f060cc836beb51b5b8e645ea09c20eb773d11833a5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a656b0155870fd902a59f06db0782dc2afee45a6ba6ef8e682d587eb5169fad. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92280117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8799ff5a6a78c702665375c8681ac25c4cf94bc72e142736bc61a90a5a48bfee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea7767e3fe7439aaa020f8b1a142569b0b74779bc2e3f7aaf37cad4a238789. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a226361d5775ce974288119ec806ed12c11d8f199f0415b9ac769e1974575. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e208c42f096e4416282b6158e5a0494181753df658a849e0afa750d18536912. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0176f9d336d32bbe5eb59e19428ee744b07b6fd93f6d9a71eb6d01148963756c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f685616288999ea229b20e9dffe5c879633032c976ac190ee07abeed0782313. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3c647ed6b42f735e7b2144c03f1f5def0f794addd2ed2e5eac3eb9e17c49e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d752c01876a1148d595203b7701988351b0b3d32deca6a0da7c2778b56bb8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08c1810c66cd7fad6660f796840fed66ceb70053a046faf837cca4ac2bf6575. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4b14a6a3f72ff3e4413f3455f5ba9f37927e655345032eff52888528750eb. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf7a265a253b7e2c4e05425007432e1dab41c7b43a52a04ab06adda265c124. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7ed4e0f7ba74908b75c0d064e86c5af032b16b49962c8f1f4fa14f77929e3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82216089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38404129c0e0ff4cffbca2d43610bd59d3c36a24fc9d67ce5d314844e1395efb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83148da35dd6933f9dbba20336b0f33c7d76e988eec46c00a254dda93813f8db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b809db26c6fabc418acaf5de13e6a2f23a9edbf2f2bc697b038ee972d9ff83. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ddfa4766fcda31a27383f958aee4ebc258144e540c641c67aacbec8b4d1dc4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9649b55edbf4c98d4d901222e2a7a774ce765dfd3880948daad4f962f41f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6767f7ec286bd2dc2489de5f77c53bae5b238e67c0e05241967ceb953757cf91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d6ac073072cb0659e4c5e46f527f48ce7fcc15e02c3516a95bdb7181c6adb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ce11dbd3458d860af4c63ae3fb95fb2898786e913f0acf00159bc0e0cabbb8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb3d90647388ca97d8b4dbd973f1b1fe54b6f990ae9d44f3a487b8035866ce. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d52399714bd32b4eaeff554fd58852c9ee9a6229e57c5bce9c593fce69b26. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d62c2343e25990ba83ae7a5cab454bf659c871599d43270cb43d5549066f9e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0263273e59438e39a3708be328dff144c5c1b65b05afd4951142c33a84a21a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcec1534b0c9ee173ecfa767882f46b6f90833bffb3cd9e0801a2149f102874. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf2957e605778f56d0c7e43d5f0acfdad81fa8262b82f14d86ee4835bc8f498. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39d742d43c5ba8e2c0433d0a729f582b2b3e1c74abaac63083e1c5785ddadda. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30b4d4445027fdfb895af7013b2571242e1bb201200107b60b0ae5477462b95. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a6fe896058212da37e92834276adb5c9414baa4bd3178fd020188bdb5d1d4a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac52babb09c361c95a202128a6a663fdefd13e124ad86ede19aee9860c38d2. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d4fa096e7d70724865b2bbbcee9704a534baf901a39bf243e42fc7fc41df76. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0900176.