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 0xb0e99b1e8b50c3b22b729bebf6fbb1ee0724b27e7ac3ffdfe44741b77bb85a70. 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/8bbc68e8-5e2a-426b-8941-9b951058b23a.json and https://artists.proofprofile.net/proofs/artist/8bbc68e8-5e2a-426b-8941-9b951058b23a.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 0x42dcef5244a5a51628123018f07fb766a0084e807123d0d69b51eb3ca141cec1. 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/USCGH1724285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9234f94910efc97a2ec7b312db0b1c3628b2288c4f443e22cb90d1242863cf2f. 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/USCGH1724288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6072da1ddb674e9a7f01800173bc524fd89529354021369a27d3490aa5ffd1. 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/FR10S2266352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c0b671ba50a9fe985b1b6287ae0075cec441a50e7e30bccd6e319427a2d51e. 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/FR10S2266353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb9461715648c9fe9cc491a51b359f19cba12cdc52b325b40ae2a93ba26a892. 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/FR10S2266354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea73841a1e2eb1af6bf89f01f12ca52c1ff25bb551ba8024c8efc9e62e8cd98. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR10S2266358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e08495ab2418b08f52e02eded267cca1693f7838808b1ef507899fd53683e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR10S2266360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808d1ac358a6c3edcbcd0fea8a77dc7cd5f23790f72019f51dc0ddbeb0d135e. 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/FR10S2266361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e65dce5114a984b09f7e8ff8fe44d1bc25c33b58ea96f7c6a93fa39b7362ca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADO1834970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1e8acc7828ca4df05d4098ed229bc2504631db0fb103af1b43b707e80873cb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCADO1834982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba11ddb1a80bc37bed068cb6ce8290df9b131ee628242228d6c9191e290bdcc. 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/TCADO1834986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62765e194f8315addb0b24ac9a4c38f039c749703576152fa306a18d733631fe. 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/TCADO1834990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c5f2dc3b7a7a8af190f715e5568973ec6b917182949ed215ba9af73daceab. 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/TCADO1834991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c93dfc52f102522f692cc43c3782a9432e93d9e228014e512b267ba029a2f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADO1834995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaf1faf979480655413f01fdb98c36eb329c505d62371b31d9963498ddbcbc3. 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/TCADO1834997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416871388033319eee78a09d02ad3c3f45f7356e36d37e93dbf39e8934db934. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCADO1834998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687199e01530b3b8745d2eb6c34b06916fd2d4fc7097cc13e4c37f915b054fe. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCADO1835001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd615bcd76a73e748c91913ed49652377e6f2de2b840a0282812a2c8200c3bc87. 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/TCADK1767983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859dcf0b7668a743ac74fd5dae8ffa897695f5528506dfb4e4c182b5dd0ddc5c. 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/TCADK1768114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a7602a4216059f29c158b84aa2f283e4ba7fde2569dbc92136787931f2f2d0. 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/TCADK1768168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d98d429b08e8cda487962911745e17dedd9e4266f191b88fc4039d7c8ac02. 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/TCADK1768214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97f5bdb070299f43c367ad66a2affa47ff1a6b384701e60aaa546067aac0d08. 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/TCADK1768217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e4a61626ef728dce0e8c6aea55189437b731787fb99449706830b90ccd5c5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCADK1768221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcc96c8154d0089eed80bd32fd4f31b5fdc626db5569e61d37558ff6316a610. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCADK1768225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585ce5b9e7101f98ac65627703a17628f947be3b6e6dc4202e9577cc88831629. 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/TCADK1768229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf657c2ce732691d3534ee806942224618216d5fcd9b07b9c08b49dffa2a2523. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADK1768232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d38d737c247a17ce6f5c21b09ee90505757199fa08e07eda3bbe401fcb17322. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCADK1768233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8cc4492c67f709de033f4f865872eef3cdfb4666a460a0c78ba6fcb153d55. 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/TCAIP2477756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48565ac95c59c84f2b47fee8a8ce80a220df78ce69cca1c3e0216c84be2b4c68. 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/USLZJ2354943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ae7e95c236da99aaa485f9742edb7f7e6cdd63f79ab0cc6b3acaf85c272f8. 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/USLZJ2354947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c36d3179be9ff15c3a887d23127c0dcf8a1cb78e67b612caeb4cb0dbbd454e. 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/USLZJ2354949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1951ba02c2cd2278ecafd2a15e42bdf285f2b78745f51d342b9d6049f0b63746. 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/QZWDD2213978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb3c68b93d4a2673f91ed26215cea5120595dd7c30fa1775c1708324bb840ef. 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/TCAEX2062354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ce8a3daebf73293bc5d330cda411be568d2ec75fe2323d8dd77b50264fc69. 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/TCAEQ2065835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf0c8945519cbc743773c1e8829ad5ba94dcec053ebda17060cfc7038405951. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAEI1906039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565fedd57c4fe50024e4258e23c9bba19fd66f6d6c90892b46e79627521c5f90. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCADF1748039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9339a1c3941e82cc86b1f45de7cd73172ce3d74e6982d3aadc3a7c8e77501c. 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/TCADE1706613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe969710924e3d9dfc1ff085f67fc96f8c12e37fb8e23f0bd69192382a499b9ae. 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/USCGJ2104396.