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 0xdd9fc4c4e44b948826df286ff80572f63e68d9bc3f0afff7cde08231fb63879c. 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/85f28a75-0392-49d6-90ef-9b087ffa2393.json and https://artists.proofprofile.net/proofs/artist/85f28a75-0392-49d6-90ef-9b087ffa2393.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 0xc54bcaaa964c01dd25b2d002120a43dbcda78688ae750c0354902ef7abb3316b. 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/QM3DF2158107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa967d1ea899d1bb84b94df38327675056c0e69ee33e59c9e9ad6966b89f902ec. 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/QM3DF2274777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdae9b40ab8c321448ae72fd0331ac1b47b280e31ef7fd74c1dda10b2acb3b1. 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/QMANG2250185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0f845445e61bfae3cccc3846b4e1cebd2966bc27cd16c0a2c63802bc87a87. 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/QM3DF2258405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8411ad48380f15976ba1cba43e4a12bff5861b3175f226107baf24756f1bbbd7. 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/USANG2276519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd735d9aa71751e99ed4a9d4f1401b1878178643bbc3199cf57b8f2a6fd58c002. 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/USANG2296498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed521703d184b70499ff05c5d70ce0f90e04b84e49c1d0db5f427ad14feaca7. 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/USANG2265227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00011c34e38e09e5ad08ed5606a6c69ef5ad54f18fc26dae0bc8ab0fe577b52. 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/US3DF2259815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023397ab6b03b861fc56bb430754a02a037c5fbc9bb6b377f5608b46f2952eb3. 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/US3DF2248482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8724b6285d2233b5114ed4891d137f1de26b7b492bfc75dfafd4f2b56074a578. 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/US3DF2240045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0df11874020c6a3b7f1d9c98cd8736e657bdc50c196ef5c5d15245005d5fd5. 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/QM3DF2184525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c04effe296884135fca85393ae05dad5ac1ca523c24bfdc3cf389c01fc3a01. 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/QM3DF2174362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c2038df9f299ec2227c53be5a7c09a44d73b76d57667e08f466f5ccabfdd30. 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/QM3DF2161944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270440757c72a3ccc6826431cf8b386768b9c3caf51939b360430679d31a1a3e. 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/USANG2121487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93273c0df3ca4274976f41126700d3cff0a94164591c553664673e0f49921f34. 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/USANG2127115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c3cd5b8725862c191cbb07ad5a0c2ebc72d7c3cb7bde330ce2d620680a9d8. 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/USANG2125063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a81282f9527105854389289a2ac73bb025dc7b845b8498aff083b3d39773014. 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/USANG2103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e0783e0e76186b035c408e18deacb05a84721a61fbff1cc7b6edfe3824e3a. 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/US3DF2065666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be641967199edfc839625963ede5667dce5944addb99f87b20939ca4504e6bc. 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/US3DF2482586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e2df97b88f0ffdab1e7f310e52248d85e21084497c181597c1551599b1c74. 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/US3DF2464949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ace7edd082693c460c4ac8aa7862d5b170c328c4556acff4b2d5e531335d0b. 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/QM3DF2224928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583a5b4d7a2bc2ee61b4623ca4bf8ed4dabb04e07181e31e1caf8d06b39482e9. 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/US3DF2520031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f860bc529179c86e8a3ce8abfe28e4f0598b10adba6818fad07673fccdda57. 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/USANG2430259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6870dbb3cbcccd4f983470f9bdab480780924633371155fd64a4ebb3b844c466. 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/US3DF2152986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d6e93b1772570651fc4ae6bbb770840e19240df70b2e0416f96ec7647391b. 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/US3DF2509952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f23bba6b31171ec622102291d5a0e55d4a6654ed6813850d3ee7e33c8965b7. 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/US3DF2228162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b715ded6ffd2a62b223fd7b59a0db1b837254007ecdc8da059a9f53d591fb5. 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/US3DF2514246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00c66d6679fd036322cf4d8bebcc68b37c1150a620a285844859c21af9e1ec. 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/QZ5AB1894277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720acdbd900dfba46b87d78fbfbd0e40aea9d1ae21bce89c694eabe6d617b4ed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZ5AB1894279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e220e4632a7efa073e719a1f02e989acd0b5b5915026bf421b50de0b76183ef. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZ5AB1894283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e69ea5acbcb97b69b5a88fe0ed4d8c4159cc770233b67b7c1436b34c3457e48. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6G2398885.