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 0x58a16765834f64afe6e9aeb9e976cc897eb69b39a4fc13a826374f7c99f08a2f. 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/06e0c51f-d621-4fd0-809c-8af20c1b6956.json and https://artists.proofprofile.net/proofs/artist/06e0c51f-d621-4fd0-809c-8af20c1b6956.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 0x99ba829cdc5763601bc0f101e08bbda525573cc219414b76ddb2a0ebd54b98dc. 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/MYEM10000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0992f8fe4ba591c9c1cd5a158fd7103834e07affbdae83a9e1332215a46b19. 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/MYEM17600001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12965a1f71ab054721368fa168fff02e8dc0bcb850dfc9cf7f4d1f22cf6ebb. 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/MYEM17700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12965a1f71ab054721368fa168fff02e8dc0bcb850dfc9cf7f4d1f22cf6ebb. 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/MYEM17700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12965a1f71ab054721368fa168fff02e8dc0bcb850dfc9cf7f4d1f22cf6ebb. 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/MYEM17700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12965a1f71ab054721368fa168fff02e8dc0bcb850dfc9cf7f4d1f22cf6ebb. 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/MYEM17700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df9c8e0972b01f005c183614f6b05459aca78112aee55a133c1bd65d3cfb5b9. 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/MYA118000150.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0992f8fe4ba591c9c1cd5a158fd7103834e07affbdae83a9e1332215a46b19. 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/MYEM17600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48709082403f5c94c74a5aebf98f12f40f74f43ffc3842dcc8e2ae2bec9c85a. 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/MYEM17600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5392868e49fd29eadce64f32784eec1badb0795cf3a0741a418da495991ef5b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/MYEM17700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070b2bb43fd66639294d42ebde8f23c91d3c4dab4b60b8a9d7fe2d3a1b59537. 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/MYUM71700080.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5392868e49fd29eadce64f32784eec1badb0795cf3a0741a418da495991ef5b. 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/MYEM17700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0992f8fe4ba591c9c1cd5a158fd7103834e07affbdae83a9e1332215a46b19. 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/MYEM17600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea3445ae2dda859c3bac43dc65e6ad640983c5a69aec3104459819f2a8d13d3. 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/MYA118000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05019081b1f639b2562437924043fb06636121c0b4b05b18bcd56cc0afbaab87. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/MYEM17600012.