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 0x5497e6bd3927fac24bbddeee6e55b30cc2c4d64447e5efb5c5d309cc39ee72d7. 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/f5af6595-55b1-4583-90d6-fc00631d22fb.json and https://artists.proofprofile.net/proofs/artist/f5af6595-55b1-4583-90d6-fc00631d22fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa8f14a4a98a0b2160d91de9d678dbae0a013be0d807d7ac7e102cdeda9ca28df. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEBL60601402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565208cfcbe8993f1b7570bb02ad3db9f7d18593bdcd746093e38d01874b77a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEXPJ1700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc74d7a95ad7efa60aba57ba87ed50eebeb58196ba7fa0099f5a8da596321948. 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/SEVQI1807001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470d3d2b80ab8c106337960c21515257aeafa171200ed0a0ae27f6fcc0917f6. 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/SEVQI1807003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf535938c94084bd2d95aba4567d1437031da5f0085444fc4e0263c4e5c07789. 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/SEVQI1807004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89512111f77e19a684c677e3827cb1d938837b3cf427ae0d9221a53eba86a79c. 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/SEVQI1807005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d8f37125460c713e96836520248cfdc7f21ad6a2968d6b326f2720925f88a1. 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/SEVQI1807006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d60fc92fc0e2a27b588a7ee8c0be292c56e58e66321c3698e0a7840afa21d3. 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/SEVQI1807007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc60cb2d622e2d4318c0e9c702b8262a2299242f5fbc02db6c0387cc94b789c5. 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/SEVQI1807008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a8a7eb8a389e0c06b9d63a5674cadcef1684b308da66797079619377a90f0c. 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/SEVQI1807009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a2ef6e86139cec071bd2fdcfda6437bfacfa624bf5b62730c67858164dfd08. 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/SEVQI1807010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8016a972c9d5bd93fb8fd29df97b12919ab4e247815aadf9544b81f5df682936. 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/SEVQI1807011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d987767c7aec0b4f9b453d10d480db2210e009a099f0d1d314956d83811b0b. 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/SEVQI1807012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef7227bff900f7938a32f83acf7c3c5cc720a7942d0e4e71f10c114ef28e661. 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/SEVQI1807013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207090d7520283f5fbf3d6f2471f6cb31a87b0bd1a704f23b67d14191d17f378. 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/SEVQI1807014.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05152010ee70ee282378894749818d3f415a4bdc9c995d9a2bec7a78450f02e6. 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/SEVQI1807015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43dba261c5f20b1a9a258c5c41e9765df07286f613f17c9a3235f3a84df33c5. 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/SEVQI1807016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7cd3f50b0b2c7ae3f428d3f70ffcb8982012627c7b5588d523a08798dae937. 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/SEVQI1807017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d041391b3894fa3a160e1db2058d0db4ea412787765a0355a73038759b726a3. 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/SEVQI1702801.