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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9971182d0fc6732cbb86aaf30c4ad156424a7440f09dc1aa6f17228b55ff42. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/057279fa-581d-46e1-a1cc-ff49dc9b02af.json and https://artists.proofprofile.net/proofs/artist/057279fa-581d-46e1-a1cc-ff49dc9b02af.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743c972f1731fb0679f80db063d9ce94e843d5ce02e66c0b62faa856c9527827. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INV118500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae2665170a303e9f6e38a9ad4b22d6a6c70a903892bd93925ae425154a48848. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INV118500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7206eed398f885c0f6a6460160fe285b4fd8f46465d10929cb35efeb3757ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INV118500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984483a0dea2b955f58eff943b90491a7a96dd6148dec64f0be29d721eb88e93. 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/INV118500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9274732ccda74c01d67ff9806e403c827cda36983ede5ec87302251ccdfb6ffc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INV118500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877d5e92e21132f560d5f6570c442b18666ee25d2a11d659fa06ca11869a9f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INV118500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89280b1c106868aa2fbf0331f916cd6c26d3dd6e474cff583b5133ba0c78310. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/INV118500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f5bd18c81113b18d6ac71614ac06a916b49144b2e0218a08d07de391864c3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INV118500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab81b9d56cd0eee0cd959ba5df4d7bdd3340c5dafc93b96b2ba616c9212ae2b7. 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/INV118500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494d5d1e860679b3a5f496973ae538e8d5db9011636025acedcd9a71b542ccbe. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INV118500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2851f19c13784728c2b864fbcd07ed773261e2e900a85fafdaccd624144b1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/INV118500455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe07ace2244769c845ffcce8932c6d6dadf30d6f489290df97ce40ff2d7d8da6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INV118500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b94fdc39fc683bad4fbe86c85c93a03f0293807fd2e2c07eceb2289c94eb1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:04Z), 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/INV118500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89280b1c106868aa2fbf0331f916cd6c26d3dd6e474cff583b5133ba0c78310. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INV118500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f5bd18c81113b18d6ac71614ac06a916b49144b2e0218a08d07de391864c3a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INV118500452.