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 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 0x13e8a5f4647a036d3cfd719a601552073502c96ef9760725875476c59b6ac9ca. 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/21cffeb8-fb75-43b4-aa20-ee18cde5cae5.json and https://artists.proofprofile.net/proofs/artist/21cffeb8-fb75-43b4-aa20-ee18cde5cae5.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 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 0x010ee641996cd9cceb9cb4d5e08bfceeb4e9cc88f0a2e5999f993608d10a737d. 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/US2761280406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd065cb2d6a2615caf7d65a8c415d3b631af87218ab9ac2387bf5bdc5e087a5d. 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/US2761280407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd2225966958003d9c50155c66fc29ec30896223e962c5fa9071e1c662a9dc0. 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/US2761280409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe426f59eca6837f0648fd1978a29f1d8532cef18c2bdea31df0076a9b577dddd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:44:42Z), 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/US2761280410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcde8c82091bae1ac75ce65fb6f95b52167b9b35c041f861c799305ed2f677a. 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/US2761280412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf0eb792a1406ca3a2181a959d04797f4aba6e34771e95c4f9d898b03c24af4. 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/US2761280413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0cfbc94b658ee3156e140bcd421b6c35460e245c87f9d8562db6e567ac37b1. 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/US2761280414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad637795215c15e4fc8f979688c3a224f697329f17d8efe7e65af7242ab09ac1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:43Z), 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/US2760901403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460a32f74ed1ddb5693af94ea2ea086f59ba08ef493c69ae94244d6ea09d9c3d. 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/US2760901405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59de729e6ad66da3a5bf830a9509c4e34ac117a4dd11028048fc4c0b1927164b. 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/US2760901398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2815e1a64245de03561f160ae6cce28574d0142445b1d5c88cbcea44a8b31f. 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/US2760800861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d37840ae6f2d4a3a7268c6aa7317c9876f49e781fec901aa1d0d70be7fd80a3. 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/US2760630095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ad96d4313e990b92ea6ae3c3a0d67b5746968098399a113a8c551db4542c88. 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/US2760630096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675e53a12d35156d9f1137b7cb460eb78738d7aa6773674033654f523bb00ad. 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/US2760630097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6f49c0d3ef8e8bd8248dda24a759e7b9e7564765ffa63dea9cfb3394f09ab. 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/US2760630098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd962423896e9214da256adefd525bf6acb7dc77f3d129dca95e79c19ed2bd439. 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/US2760630099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8344f800ccd1cb1165aa0a88c8ad8d452988046654136ec68e8afc3d454372f7. 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/US2760630100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c67c1d3b0046f5f5ed8e3474e0f79e5b1ce6e448f77531dd37759dbf4afd3d. 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/US2760630101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de308076919ac677f96031e21ec16aa98f94bd620de586088aaec16af7d64e9. 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/US2760630102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f19a9b11e288f535e3f18287a2678033e6bd25dd033f5546f1d1721e33a8d32. 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/US2760630103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ae0032d774dccbc0d714fb31711de9f1340a3d95b0bb0b0a852ae5c291597. 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/US2760630104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3527e43ae347477e67a125815a25785c2b8016d94a54fc5cb13140100d3825be. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:20:58Z), 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/US2760630105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfd9a75b0fe53d05e5d90a4db95e4eba2b1aa05b1a97acc5904013f823e2b9a. 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/US2762303736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e83bbbb73f92018fa6933614716b331a556e6b2f6a81291b4a36cfd058eeb6. 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/US2762202422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9f757d41fd3e99703e4cd623d038d815ab3e454078f3ee975b8369aee59549. 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/US2762101387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c02f0b79a73959f2b8bd92f6bd16b126b6f22599e90d9e2e7818fc8d2d6c8d. 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/QZMPG2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec658d0049eee55ae97a495eefa25c3f7932431c8f275d41aabb51555a4062a. 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/QZMPG2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8c812cac2c4bb78ccdb273345a60508dace3c8e840c14fde2f2b58d391231. 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/US2761992636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadab00641d49acfb3a8f0d7d8f6e6d9f002b4ba7fa8cc496805bf62b96736a9. 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/US2762405048.
One Horse (Radio Edit) [feat. Bart Crow]