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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 0x9b3eb6a1e8bdc296f75b734d5194cd432c8cae3a9e0996700a73d5f6c426c224. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a04170b0-6b53-4c33-8a5c-c839c34bee86.json and https://artists.proofprofile.net/proofs/artist/a04170b0-6b53-4c33-8a5c-c839c34bee86.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 0x6fc8fc73914c8149f4683bd3ed3ca466deb09c50e3d00b10952466c7dbdb23ca. 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/FR2X41738860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91709c2b2b424ea8b40bbe4dfbe4d5641e66e3e5296d72adb32ce0d346b1596e. 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/FR2X41738861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6221d91985cffc1b0f31ef2389656f0f8e8735d19641645f81064e4b67e026. 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/FR2X41738862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1324bd8ef75caae5a846d5b64544ddbf4b36845fa29c1a47d5eed64269da41. 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/FR2X41738868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b41b603d2469cafd26dbfef975d5c977568ee254989170a31ae750b6b1cf352. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR2X41738859.
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 0x7fb441a321a3bf850df1bb56c313fa1073bb75ffc0bda165f5bb5cc3a071ea9d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR2X41738864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3163d9542900240f587b01a540aed2555c0606700a10740949a0238b7340efc6. 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/FR2X41738865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d5eb4380f2af57b82e2fc50bbcfe7f55a067551be111a584b536a47b6d558a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR2X41738867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885bc1b769d4b5f2c7211a406718fd7cac916aca40acd5622b87539323f4d162. 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/FR2X41738844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade601497644994caaaff182fd95e36cb52828f6e2e6ae57ce2417cda976d10. 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/FR2X41738845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aec6521c06e54f41e63457d0f306b959d66cecf547b3e0e9b3e087725afc3e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR2X41738846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd546fdf3306408fcb17d5cf62fddf2c96593398cf35253f4b836af0a82559. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FR2X41738847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd825c02afc0435eb0aaad113f7a52617b6602c2e737ee06e820ae5c05526db. 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/FR2X41738849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b12fa3799b4603b73844d160959575204bc1b8d210da14650af6d8ca1dd1a2. 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/FR2X41738852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf5773817f4adc84c55962c848788422e069b989901add64a827fac467b87d3. 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/FR2X41738853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb1c892ac10faf8710ea2381a736d213c0df398bcb56f9397e9ec0b9a616db. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:29Z), 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/FR2X41738843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48e1a1183b657c3ada03e97a393f673bcc50b379ebeee829c80094864da764. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR2X41738848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb0e042dfb532221dc1c54168b22fa07ce0c389f7f6f5a2b148e50789162ba. 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/FR2X41738850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5981c9e8a7e759f1d00f14350cb0efd448f1f231dcc586334235381b434325b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR2X41738851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0145d9866a2a007196fc91c8fa17f8bb0fc218465d912a2d243f05ced7311e18. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR2X41738854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9e53c99f360ea35b0eabb6c1dedd5bda44be22eabbbb607977132fe54cdca6. 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/FR2X41738812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368bedbcaadc883d3f82a82de55546df0dcd87fb0aafe506504178a0b0c90ec. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR2X41738815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908897874bd7bc9c0b6b9a72b7d74850a96a046348baa661a4eee162628703fe. 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/QZES92545377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badf3e8082485fa9bdff2a65825a182caeb9d924cc3012de5a691fe2526846e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES92545374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9888de78cc235404614260919d92bc4ade1d90705ba82aabf026280a13268b1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES92545375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c2709989af1d62a7d647724cc8007dc31f2d70f63b846fe3f5b992c8029630. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZES92545376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d61deae4bd1b459bf794f4629df7dafb442345c3382a35c9928003df48482b5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES92545380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a04845524b4d00065147df655a00e809b9566356cb413fece7a3521adf6b4f. 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/QZES92547796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdb9e6186ac57c402dd28bf3e388b5e2fb7ccb92adcdfb688f193f9a842c57. 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/FR2X41543126.