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 0x00191ee5041408c2931182a89da01a9db6404c41e2bcd0eb4ed024e2a359f08a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ef1a4ff-3f9e-46d9-8c9c-f9b56245885a.json and https://artists.proofprofile.net/proofs/artist/9ef1a4ff-3f9e-46d9-8c9c-f9b56245885a.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 0x7f1c1c32725f1002f33f00a6477420d98b6e287edb4816db0567888eb4ce9ac7. 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/QMFME2335594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd762172bce7dc0f6986eb143cceccb3c5944fe22a197905c52f49eedec1f22a6. 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/QMDA72374888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb56557762c920a831db30dd49b986c3cf4704393b0d92c19ccc285b7c3e01b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMFME2335596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b40fafd18095ffd9265f3c0daa9a28f459a7e290f5e1b10ea5402e4bc174139. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6P42356150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee33372d32ea51454d5a4d26f06e9fbf5b733b8f301de69a5e9781587b00768. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMFME2326799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129390d44fb6f51de53e771807e0e1f73ab824c634b54aa5e16008f5c8e7177b. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QMFME2429141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51760ba27a6f94a07f128c621b36089a5e3935ee8ad1ffb290b5c323c67a8d4e. 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/QZNWR2234763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb76f4fca1db2dd42169fe999f9ffb9bf3f6572e3d8b293ad2dba5acf3d46c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFZ31942882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ddff010805919e3d503401d58e639496254cb8adad647d770b2fb868d86ed. 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/DGA092496598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8eaac4d319d3b4059268e1072414e327f47c10162a0f6445e2b40f28e006c. 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/DGA0M2419270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb09d118cef65d10fa84302e8613d58331422a2a1a234a97ef543e1746e194. 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/FR10S2521153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb4b2ef7d4baef143c685963a1be9eccc544ec32bb3e902a607441f8ce73fe. 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/FR10S2521154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29847f58c5644287c5d8c155c575c7fd17706ffb1a1f14a1bdee540289224c8f. 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/FRX872478098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96c57794c6772e052d41f483d0c92002e8f0cd67a9623f136df75c992818b49. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:35:53Z), 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/DGA052315974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca00cc5d8bad9f315776db8730eac99a69d61c15c890913c513d8f13f0a3c73. 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/DGA0L2385200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec40bd6c8ef162b2b7167280c0c4e044279315b93477a65c554d5235ec60953. 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/DGA0Q2366133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a840764a7bf68086b629adcde08b517ae9135e967ffe753bbac2fa91a6596d6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DGA0Q2366127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626862821d4a300e0430f79f659f1ccae30c525e50e17e317f21d83dbd8db17a. 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/FR2X42345654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188ae14b3bef4f2d4d738ef61909d7c309b84d100282b27c5e6b193ab957893. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR2X42345655.