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 0xf09446e58f5e39ef465728df5f60af32723582102bc3ce32eb6ff9456547fb4a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20bb4a8e-d734-4649-8dfe-f5687646cfaa.json and https://artists.proofprofile.net/proofs/artist/20bb4a8e-d734-4649-8dfe-f5687646cfaa.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 0xf83edf8418efee83eb8ec78922cdbf845920d9beb16c3bde3038f84215263ad2. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/QZRP52281200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a3ebbcfabbebd1bc7453d3694adf4750b0351fd6af604ee0c85c2d302d3481. 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/QZRP52281201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601da74b636f8075a81b899fcdead8def987b18f8790efd8609c8c2e2afede5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52281202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011ce3cb32b8262a024c37d4ca55ad09fb7f73e5d2caa9615108f71ae2a3eb94. 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/QZRP52281203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8560d08bb139b5af03f03cebda255bb1e75738b43cf9b54882618cecc83a227. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP52281204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2689676ecdf9bf4cafd55c61320baa329a4de7af1499b624c3b62f5aa3f8b78. 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/QZRP52281205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fddd2640780e5cb6d4ef6c0a5288083d03a99ea38add1a7cefa3ec03205c1. 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/QZRP52281206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f8eb44c62bb7e5818c24c2b65b5e0f7276ebe586c52ac50098608f7dbec58. 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/QZRP52281207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b0d6922bc78ea6702ac818c186943af74f9dbf991bc5c9a0a068974655a5e9. 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/QZTB82220561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57969466618cad1d8bab594579acf3d703d4a4624fa20024ef9f0307a3dd01f. 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/QZTB82220562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60a0d41ed4041a8a8c0430e4d6713783d0a4265eb54f645295e064384b487d3. 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/QZTB82220563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c6c6312f0cdd037c9c1f786d376a7e2e373e3105703aee283a3eae907d4cb5. 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/QZTB82220564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e079bad29b65e1ffcf3bf32ec11387efc00f6a31c193fe81445ce2cdb456f. 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/QZTB82220565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279fab8bc6026d206d300e3f33be7860dec7b409df9af9e5f3de0dd942ed61f5. 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/QZTB82220566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753614b7dd676d9baa129f783102ebae036738940873b940b52179da3a8f6b1c. 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/QZTB82220567.