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 0x2a52564bd6764d34ccfbc0722904dae76011437555060e7c24d12c21aa6815ac. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c204b460-397a-4974-b411-ae894446b522.json and https://artists.proofprofile.net/proofs/artist/c204b460-397a-4974-b411-ae894446b522.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 0xdbb05252147964423c61d444b11c022b3ee51c330bf88120bef973b787655a82. 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/UYMP52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548d5eacf815a2543ba537a81c559bd2c93a91564ec36185402a62c764ad3dc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/UYMP52200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14f95b312ee61425a177009aacd7770c7922bcf951d41d39d8add2db1d887da. 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/UYMP52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e0ac978da33293a4c0178a309d5059e55fbc8d2e1a147a3fd9423216755e5. 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/UYMP52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb20bea3f31622005df08586e9c011f0577b0b340380aa9d31b3d596ff5fb3cb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UYMP52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdfcbda7390026754e09b1d22509e2bc45031a22b8a659e8eaec91606668ff8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UYMP52200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001d4dbd8ca7fe329d6e28b9a5eee49106f1734dad0daf6879bdf0a44ade7b07. 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/UYH262000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c85b3ff3ce7f4509db005d42ec713a05214a8f08a45e1d6b5b8923527fc5d. 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/UYH262000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc816027583062caa138238952ea3b5d70354e2d9625bd79d9dfe64c3714aef59. 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/UYB262400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6e84d0bb5f816e0e3bc51a9f07eb240bc50f2501c1df75edcc6d28177d954. 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/UYB262400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5b4c57910335251c42403d837611c292551851eb7517cf6c65839490984c8c. 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/UYB262400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbc50d5ac9f826af73c6122cfe6fd1645d820ff9c352df990324dc21af34997. 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/UYB262400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ecf61f04ae49fc80d177cff9363230489168776d52337b92d6edd7e20d1ade. 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/UYB262400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d7119ad900868f3ef41547e76a3d0528dace9875e98cda13a02aa8f354d1a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UYB262400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fda9dc1fb41f0ed912edd50d7ac3fe1b84ae3bfa5f011801d69a7beed3436d. 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/UYB262400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71bd58518934f89f504a0f4cc38dfb5a6ecbbd6399b72273085b54c95b0d5ac. 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/UYB262400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce936d38c6e5f1382bf64cf6e2ad46c3c5a543ed27c065886ef8f59ec7af8a1. 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/UYB262400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f094db83ef38c7ca1b8cee531147f483e87da91d4b216e4afcff2e28a08abe3. 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/UYB262400208.