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 0x51a05769eb15a7032b1a03ab76af75e0ce5833669cedd19345891fe5db920b45. 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/0a45f26f-3820-4810-a1cb-f4990b00ac91.json and https://artists.proofprofile.net/proofs/artist/0a45f26f-3820-4810-a1cb-f4990b00ac91.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 0x8e30d7757e3edfab510ce4a9107fea8b84b3bd33f91055b223f48fd39974c975. 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/FRX762472043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55c659ab13209ee657049efcc37b7c5587d2b0115a14c024dcb6e19fec088b. 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/TR0361500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4556dafc10de62fa99dbed1a8bba62539a6935c8d552188fbc3dc61750b5d. 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/FRX282228171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28544b9d7d75032f7ea9817d3903b91c4149ed1006864f72279a6254e869ce. 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/FRX282228181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c08844729ed6e073497609fc3554c6ef56e82745aefbe0cfadef6b5b1b498. 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/FRX282228185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd9da26c1da3f219a0cb8aaa122efdb412a2d9ce0a9022a1bd5a7db8471b55. 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/FRX282228141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b1364b4bdd96b1da76e83ff7e4a3c727d3f3d3d9eafaab450f351906b1f949. 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/FRX282228142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6a5afc488a313c9624647217beb64dc66090bd13538804a1542639efe3dc7. 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/FRX282228152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce43a0c45d97b76503cf261f17dd204eb2368f1eaeb95273085ae5e63ffced11. 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/FRX282228154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69d807010df5529627a65a04fe937876fb055f0e7a3888fd1e25e1adcac00e2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX282228159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9528bb6c00e69923676b1cde7427552131db198814c1d1a465462280a5a24e15. 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/FRX282228162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c5164941dc3cc349d237e29a88be286bfb5b4422f061da3690cd9a2764e71. 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/FRX282228169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bb5a38c918c7437ec71caed786f23feb1aa4f013710434a278185857869e55. 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/FRX201920694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626b290e2cbf09476a3da7353801c76e4ebd84c8f65bdf26677bc9a43a08d07. 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/FRX201920696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf154fad5dfb3818575f670f2dd2ee51506381141e39aa03aed39461e1adeae. 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/FRX201920698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a3c0bf60a611d0d25e7a8a0487aab4170e3b8ac36ef010ebf0c9dfe81d53e9. 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/FRX201920702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c521e54ae1c6772e4341b0eb5f02a26058919588a6dfbd65356bff746fe91. 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/FRX201920703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc900820abc140a5bd239ed66252bb074c6eeefba0c68da2ba63ee493f610fd8b. 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/FRX201920704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd113cd734e235132f2a87758a23e5cd2f9d79ae02febf9421ea1f3098e4dc04. 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/TR0360700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161dc1e202b90aa9246991b752ab4b2cedaca71c5117f09d484f7a542d671bff. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TR0360700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521b01472174ba61de3586292a4139158fcf8b062f3cff89c22ae9e01c316267. 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/TR0360700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ff238683806819f69cc2382dba68c2fae097af660c685ffa92928328116d9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA052205173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49b82cfb0bf368f16953558a4ce96713138bb7d7642236ec881ee80cfeeaf9. 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/DGA052205174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf9c63467343ce434a321fb044c178200fd3e5da04a7abba8ab355a175256f. 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/FRX202244977.