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 0xe646730b1fc41c20f5bcac003d83a7e55b6e666a8d4c8cc21e8bdd4770b0582e. 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/899533d1-1df7-467e-b984-0a4d17465a3b.json and https://artists.proofprofile.net/proofs/artist/899533d1-1df7-467e-b984-0a4d17465a3b.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 0xeb2c30f9c153eee6b6ac29d8cc10e9c151ec35c38a89be1abb5f3877c640ad7d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLG491200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e187f4fd985d3e13d7d94c10ca95d9553ec26ed8b47d3efa746364838454c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLG491200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adcda057c7ced6e60d29b4502765e5bff11e32a899e5b2a76fbeea8efd530d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLG491200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646358e09b24e8afd8066b114ea27c3a97811676577d8d7bcbeda5f1d2252d53. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:33Z), 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/PLG491200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f85a1249b96b1fe0bce7d049269e04f8ed918f42507793be8b8d6a2b09a07ba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLG491200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e14f06c4038850fafd8447554ab406850e9ed81248074386801d7d3651e7e42. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLG491200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c96cc631329da171afbf6c3e8287996036a386d317f6e2e61a24a15f42ca3e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLB822000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996051c40de6449289dad6032738d895b33edb055dbce18510e83b04df8f0d40. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLB822000649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e646a10d989ff1fd71fe02f5b7b1710bd37a2c68e4caf7ec2cd0f31083bd4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLB822000650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5be63452776380daedf11f95e36f1fd52e1fa3ffdd9b02114fc0f6ff0c8b5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:50:57Z), 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/PLB822000651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aa58c4950180db17f2452681ff37fa5ec131771fc5f36f1301914b30cbb64c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLB822000652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b1385131a73bdc570028a0aac29ad8f618d8a6f7dc3c530aae089cfcd27a34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLB822000653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc82c7ebfde3f6d717c598bdc70603c594138eae33faddd96fc358e00d952e69. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLB822000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f42ea91bf6de0f1e7fd0104f33af76c9d4596952266988b79dc0e35a1c28f. 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/PLA391146110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bac246cb69325bdf4814caf2a998c68f864c76bf82e1bae9cf92cb892b0a870. 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/PLI368025630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41975f8422047b636bfcf878ad6c19d150be579debc1c7bc6e575aa9cf5e3c8f. 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/PLI368025650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e88940399cddcc1990c3740146f416628b8a5964b9382201fd37370edb95b07. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLB822400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d4458e058b369b1d170e0fa21800622ce851acdbd24df257e5e5a6dd4f79de. 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/PLA391145907.
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