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 0x33099155ae3b465beaca48c24529f5f39bbe53db453f7f8c954311d53ddbf65d. 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/6790473e-9a3a-4acd-b414-744572837e30.json and https://artists.proofprofile.net/proofs/artist/6790473e-9a3a-4acd-b414-744572837e30.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 0xe6595a1b4c18d3c7655100b7b518f9af8ac16599ee08664235ec64ed3dcb49c3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/INO131603336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef9ebc3e989f714f99263814a22313dc87ab6c07cad4fe95164990d94b2d56. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INO131603463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e811acf5ea474b59bb8e1f972190e66590111ac37c1034c5dd0cba6e70012e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INO131603464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ea9008981368fbc608a5562d74bb77045cf0e2a6953cf5439f53fb186c846. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/INO131603466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0036cb08aa5b9fb123bfcc517f5d1156461dcd65729d8a65c58cfe8a4ba79e0. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/INO131603467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f72014c5c02cee4e4addfad3b37d1ad8e802cb2725fd45da2fc6beacdd01c2e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/INO131603468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2703f4bf5ebda8dff1b2eda37c0ff723aa5a21ddffab9615b1374a431d9c96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INO132000617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2c11752edf0c80eafd8eac28358621c7bcd14fff0debc213f72ae4872d6dee. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/INO132000615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa2bf9bb6e1f3a7a68fb759928c316cd90ecc78e2dfb7dbdf59a2b9e83d121. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/INO132000618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91edae193924fdcf03bbdb0f0b96e80c4ce808d8d209cfc900b35a2b6444c018. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/INO132103650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1478c3d282c5300b46c28ceb80b2ae52792c9b740bc48782b7252e4d8ea72. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/INO132200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663f4a4729070d4f1930d27dba1e38e5df10259f5f5912c1ae3d8225b48e03c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INO132200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf524df52f44430a0e41b74d93b57d20831fac172d9c9dd7b18724678720a85d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/INUM72200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f01dce5a453c5fd54aed37d7b42ecb36578749cd73068046e475e0007378bc4. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/INUM72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70601da5f7c36ad9ec3289922df451c5a3b8e7c63c1c7f032fc9019ee7995c. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QM4TW2351305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf524df52f44430a0e41b74d93b57d20831fac172d9c9dd7b18724678720a85d. 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/INUM72200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257f52268845c6b57701914de827fc58872de5489b2a1cdb1a3d419a32072d0. 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/INUM72200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3799fd7c4a784602276ffbdcec6045832c31edfc96f01502af8f1e0e8fc28. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INUM72300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7133c26ce8b51e6903438fc902b66670e175e7f33f3be8a4a4b09b9b32a960. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/INUM72300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f03ee17fbabbf310638e38610eb1f0273bce2182fd4b9675bfd1ddcf9dc3c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INUM72300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfe62c296f7ca6ef06acb134dff2978b39cb160816c527e9008286da5e0782. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM4TX2438902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1985af38d78520d12c5f4505cb2c178f4788728032e35e22eaa6ecacfde9b. 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/QM4TX2438903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c9ef5b19531361c9a4c6f243245574049bef22ed3e467f4520b01a3fbf9fb. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QM4TX2438904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8969a556d36a69ce060b2af95115a27ea2514c55404eccf64d627886999c8b8. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/INW262535240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e35ddcab1816b2aabb9f71a1e2a5d2f84d5c278c69a4bac0bd9c99e1ceed5. 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/INS172400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfa79d50636e7f8ef46f475fa37bfae91bc8fa672e28a88b09c3ae747f5698d. 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/INS172316529.