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 0x0ec02c742366ddd11494b2ee4c5caec763635c1e5e6cb894bc945164b9b0a30a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ea0f94-9c2f-4abd-8342-51a79d1acb6c.json and https://artists.proofprofile.net/proofs/artist/f3ea0f94-9c2f-4abd-8342-51a79d1acb6c.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 0x94f38c745c0be75ca6ec7d330c7cf669415b7a2a3a2027a62a088aa4b00a5670. 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/SE6HN2488083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d3d0645ab3d12f755bb0b07c96252042c1a608f41b14bb7c919709eed1c08. 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/SE5BU2461158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7874555d7b826efaf3a99c54fe584a1949b7527bb0a2a1b09a662a7415bd94b8. 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/SE5BU2446122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7874555d7b826efaf3a99c54fe584a1949b7527bb0a2a1b09a662a7415bd94b8. 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/SE5BU2446122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb38bf6bae1920b932a786582ff829bc0ed13d0b47cec2db49dbdf1f3c242d60. 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/SE5BU2422234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1a8a45bdb61b313f5aeb95ffa8e5018ee8eb90258581a506136bc045d96425. 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/CA5KR2407530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce594d7e6efd2934e3361579be61c91b1f50f89539191f16898cd6a6a2c5dd. 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/SE6TI2338001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935a06bb85f36a0bb12a6c67a89fc1231107d2909d3895c97b87c69e7210bde2. 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/SE6XW2361106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1c76a79323b5bb6f54aacd5e75e37f6db72006de43065941aff7892fe9c64. 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/SE6QE2305288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c72f4c39e98bd56f590ad45cc785ec2bbbcc749b131c05465f7bf1c0a774a7. 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/SE6HN2308359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b47241a94f614f934c6f9d320c06d45871d97fa952380d4044d0f9c64bcb3. 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/CA5KR2320289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a34d19dd27a201298c9a4ecce33644e2d7c0c431444097e1593065d7c89bf. 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/CA5KR2315190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e68a4c9a4de7c510edbf4ebbeeb01f2f65e24cc8b3b68229f27f1e2209b2648. 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/SE5752233881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb07ff0bb99702184f58bb02077fc9d8603b3dff66b5be0cf736db94a3d910. 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/SE6I32290340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10dbe7b610a0d82b7a5552b045a80a1f37d3136b41ec574b85353f94cf2f0e. 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/CA5KR2266296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbc23d09211f412156fa80e0e9ceb7f66ad3d04e64bfac1d8f89be26380360e. 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/GBKQU2213987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb177249abdc31cee01025dd6ac8d06abca57e7a9127b7d2dfef97bfed29e5975. 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/GBKQU2213988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3799d021cc9ef4a12726c338531f79a1a48e66084f4d817f6ec3a57e6b7011. 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/CA5KR2185436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f0b3c86a38fc0ad25d4a0d825fa2f8cbccc9d62fe0f005d70c7b568f0cbde. 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/CA5KR2133047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74f47d1fb0d0ab05a3e3ad0bfc370ead90287702a610fefc65973161792e236. 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/SE6QE2038583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3799d021cc9ef4a12726c338531f79a1a48e66084f4d817f6ec3a57e6b7011. 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/CA5KR2185436.