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 0x7691067bbb0d2a0b15068a4be9ccf8a2a7a8e4906d1879cb4b01211d594f01ed. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c691c97-3b9e-4844-b964-e9d8ba402a60.json and https://artists.proofprofile.net/proofs/artist/8c691c97-3b9e-4844-b964-e9d8ba402a60.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 0x65ac1fbdde401205969530a3999d22f10811b1842af978efcd0dea41a865ae59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaab3f7784a9e9f048b3a8afc46d54eb250db73be94a70eda763178088b844d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc457edb213b9ef5fb767d3744ae2a09e4121c23c13414c0935a4482d62c52d0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2301394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e486f4ceec338b2ef7f8ac13a013888c12de502ab91bf3f4e3cc9af1e424899. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2025201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226305583236018cdc7bb8fc55c3cbf950c430e3b9460f71150f65fbaf8c4ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2025202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcac11a391bc43d13a55afa34be266ae40acedfa6e6d263f02cd1abab76e75a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2025203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0264aace469cd4e7cf65ae8459930817989730cd1cc2a3995771220e7437316. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE4RG2025204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124182d3ef41be9dec6f14ad5a480e14ff469d734dbbadfb392f14cd95ecc4e. 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/SE4RG2021102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247be572c004c69b29dc370cc37bd34cde3dc83e582fddf3b2f1431f5c0ac845. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE4RG2021101.
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 0x3385963707205619aeb4c623a534651a013415f12624bb34f9e282c022eddf3f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE4RG2021103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180496364a6f5b9bc0fa4d031e2bee0d68124cd3c6641b51e2c4b24e0e60916c. 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/SE4RG1940201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ec3d269a4aa731a8fc617364c766db0d8b25dcb7ba5cc603032182dcd17bc1. 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/SE4RG1940202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee60bec359a4e4a1c34db3dabf74f07799ac8f90e711054dbc9d7f1e5ea7847. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE4RG1940204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8241fdf8552d340791f3c8ddbe411adb3812c79023842a06d8ed817ba579d1c7. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/SE4RG1940203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaec3f40e50cc2f07c1572b9ba04bfc28a4ed2bc858f6a53d7bbcea8180f941. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE4RG1920001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeb2fc9206b3685b32e727738a9f77e09a0aa951d81d83d5b9ec6e1a12f2c87. 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/SE4RG1920003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b52e363f08e770e2ffbcb89aaf5ae934cee4e649de884fbf8edbff1dd33fc3a. 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/SE4RG1920005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef4c3f22a88c17f18c077f8efd6157309b961243b7b6e7e265fb9c921a46876. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE4RG1920002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a93407c3e35454ff888c25c011c4eaf4c7c6128aaca6883f3f11ef58683a80. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE4RG1903201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e118fd50653e1a4ca83f53575db83f513c530acaacf042043125917ab7086b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG1903202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadb4b0f898df1d9f510404dd66ed8f4b21de86e2c90723462d041e3da8a8fd3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE4RG1903203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee70ce9df126cfc06822a5c5f17f6abde53f431a28397d91c1a2b4ec00a698. 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/SE4RG1821602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d0ef48e5560845597788b226d273afc601b5e975fdc429af0c2d8199bf5217. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE4RG1821603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734030ad259c2945952b9c6bf0c855f94a526336d3104cdee777cb5821ede91c. 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/SE4RG1821604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0404cf1878f54eecc30d823e93e91f0da9f17b7b52bc7ceaf0a91b81db5a0d. 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/SE4RG1817802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e057b29790653cd873ba52317192d303c67d0a3495e69d66a8cec2408c0387a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SE4RG1817803.