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 0xf91d04282defcbe1c44be5f6edc1875ccb130765ccf78bc751d5b32a6d7b692c. 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/94d0d256-df25-41b2-b85e-0b0a7e86ec8e.json and https://artists.proofprofile.net/proofs/artist/94d0d256-df25-41b2-b85e-0b0a7e86ec8e.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 0xf64cbb658f83c5dff0dc661e2267577c62c57936439e2fa8d1a764c443f6d6c4. 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/BRLSR0600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2459db21b1b9396a1732c74961d7647757719e00f97e7587020cd3bae7aed01. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:52:56Z), 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/BRLSR0600803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634f4ef3c5e20cfae545c2081a0e3edd9d1d4dfce7b6bb373a7fa27fa756b2bf. 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/BRLSR0600804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e3515dc4197a26e52d78d2c30f6fec59499d5a5111e47a14554dab5d1ab7c. 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/BRLSR0600805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cf168175bb6ef56c5c6a2d9e94c1b3bb9a7d85525941b8ce4920d8c81f868e. 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/BRLSR0600806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a5c7c7aef506a9aaffe498e63b93019ab8c7718007fb31e0b6e3e7c9626b89. 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/BRLSR0600808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3a4381881789adc5a2e631f62092743df104b49715b6db2da4ca941c4a9ee. 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/BRLSR0600810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d221f098c9b13b691f33c576d406be43b2174efbb3723c51adf14c4447b0ef. 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/BRLSR0600811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa00bcac3dcb008a164de49f8148d30c0575c0f3501f493e8e4bcc511bed19. 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/BRLSR6000812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48969b64afc7daa62e4bd3534797d5048b9fe8d97f0aa756f86c8e4920d3d782. 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/BRLSR0600814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c803c31e5b95223c7d688ec4e131198e0696fac9aa7f4e3887c27c8f72b50. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:19Z), 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/BRLSR0600815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9e22bdf3c92124d36e1a79de1891018c4001835309d1a6b43b1a23a291af00. 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/BRLSR0600816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecd259bec3476af3be7aa2317ddeace2a57cb41b089c828e4a1075de1606c2. 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/BRLSR0600819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32467317b90f694355e5e9cebcb358f244daa94b2469238ce728454bcd1ab39. 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/BRLSR0600878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1054e5837a226605ed41e58ce4ef29f2b591966a251243a79adc106a03189ff. 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/BRLSR0600879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a65ac93efaeb6e75d52b20c49566922feb63e1ef82d638c54ff106fe5e9fc8. 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/BRLSR0600892.