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 0xeb31368427e3ad6334f9f0fa27be018c51b0b6963fb1b16f03e4c4315028f49f. 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/126486bc-8533-40d3-8877-559c09a4beca.json and https://artists.proofprofile.net/proofs/artist/126486bc-8533-40d3-8877-559c09a4beca.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 0x4dd319fa0cdaeab20c449153ff4628a9e50ee99090a352cb0a03b436e1d691d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH1633850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d1d7f93b195503bf83a2ca3d8ac461ae6a359aedb164d87bcf7fe4f3c38bb9. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USCGH1633851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539c6ae95e12a065038def6a6bd480120b65b46a2874cf21bce5d92b4790b02. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/USCGH1633853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f80dcc85453f998b1a53ddf6689ab769a8f041bbff23069b1ae22d9c7a4fd5. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USHM91759714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8615d6e7ed49323f735ad591030ac85fc37be6697bb955f3845c825303787d8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USCGJ1845501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8615d6e7ed49323f735ad591030ac85fc37be6697bb955f3845c825303787d8. 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/USCGJ1845501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b8adf8af40e14cc6c9683ec5b4f88e49f2d8d7ae213ea4f6e98a5dbc5c5e5d. 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/USHM21955605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3e5d17437cd0bab9d59a1a889f1deec52767abfd879cc433f85a5f5fde9364. 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/USHM21913545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb0de3c0f820ac3f965166090d0350e5e55643f23e273d12bd3abb8d14b2481. 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/USHM21955606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8d3144e1c65e6b9164f2bbb38ac0138d883e1f162231e85bae49532e7ed22c. 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/USHM21955607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ffbc88c1b6656ecdc28a19e0599aa7abd9aca6dead52cf548028d29952bcf. 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/USHM81867563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c67742a65911138e42f5213d1f40ecc7abaf04221a01ab2b6c2ca67fa0a4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21955608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4f407ea457b19bcbbcef9b2acf5fb7aefadbc2eb6da2c0ef49e5ee6c2906c6. 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/USHM21955609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6739a7c8e5f4378caa7edd2726fb870e9124c647159145fd7bb56ba9aa102c2. 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/USHM21955610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268342ac2584a4fb88378d5ce4567416168472b60f17abef7624e6e6911d6fe3. 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/USHM21955611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea010f62d1d51872d3d449134f9712b5e073371e75d14e548290e23e3cdfbd8. 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/USHM92073437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3de1d357bf67450cffc8ba16b938888e3c70a8d8080629f7e2cf53c080cd21. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH2138927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782ce9049574c20073a3b940ecc643dbafbd7501b02a38164d3b590b1a178b3. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USCGH2138928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc414339743dd040dab4293eb8a67ee74cc5e693f3495c7f28e72c570ca095067. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USHM92482543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c282b1532736061340847a3b6561ecb93aa0e45dad109f3f886c55f6ed961f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM82476840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e44560996ac2f585f3b56c0dae9efe31f8a2b5e4331745ea436f1a3a32eab03. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4R2441412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e614bc6194e724b9e47598ce7185c35c5055557228cd1a1cb9856154019145d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADL1850653.