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 0x0481e2a8086e53b595f7b754abb23cdefbfa97024c6de63d8e577b877b3388b2. 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/b06e02a2-f644-4850-8d65-57668dc3bcc6.json and https://artists.proofprofile.net/proofs/artist/b06e02a2-f644-4850-8d65-57668dc3bcc6.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 0x73915c91ffa2bb8a6f344140c596904e3ad032ad3143428230e07d427843f7d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMFMF2229459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159b25ea14d71886db5cc22e5fb7176c6d408853e5eb1e732843cf44cb962da. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM4TW2308497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9631c28827a4106dba867207b81d3dec2e11fe24f8d4f4f20e64db6b17fe865. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6N22339788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa75505c80e62889d4b32186cec24e2828fde15200adc34216aa5f98642db4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6P42310332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62768682970bf5903164e3fcae5235097c8cdf5f5d26ad9b2f823b25f74fa2a. 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/QM6P42310312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e3a277e63304c12b0a29445012962eccc9351becd762f5775d5ccf4d1aa22. 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/QMFME2341672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e66811cb0fe447cb91940a4c9bc34613d8868cca7e3bd74c8a37df2a56c5d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFME2341864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55623b0a92cdd17637ece0385acd7e9743143fe5ded602363d70098f824251f9. 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/QMFME2341885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01630ea84bc95c10b2b13682473c5e3bf259c925e4166733d14ffc85326f828. 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/QMFMF2328212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a449129e767566333638531231321db69f6e2197762b3395bc1fe1cdbd4b37. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:34:24Z), 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/QMFMF2328274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ddc989928b0caf41d980de8dd9be25f24044a7c41a917a705ac575c6befcc. 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/QMFMF2328459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b37d210284e91019e5aa8b1e6a155faaa410d68af3cd21041ee684bd82909. 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/QM4TW2533747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0483a35b3064a05ee8bc9d11443638f47c4eacc5088e66ea01872da6715fca. 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/QM4TW2533766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f411682519284f6c6b49c782fe6b640413533e8e25e59d3d61ad9f481bad95. 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/QM4TW2533777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98aa3de42b0c7e1c70adfafebb90de0e52d006eb61845e47aca584b311cebb9. 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/QM4TW2533787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460bfaa65e84404bde4ad0d937cede2daaa1e5b873fea5d11f66e1e03e08068. 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/QM4TW2533801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36672f1eccd281f8ad1bd275089867cb1a3ba8cb6752694a4779bfea64b936. 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/QM4TW2533812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460bfaa65e84404bde4ad0d937cede2daaa1e5b873fea5d11f66e1e03e08068. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2533801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98aa3de42b0c7e1c70adfafebb90de0e52d006eb61845e47aca584b311cebb9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2533787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f411682519284f6c6b49c782fe6b640413533e8e25e59d3d61ad9f481bad95. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2533777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0483a35b3064a05ee8bc9d11443638f47c4eacc5088e66ea01872da6715fca. 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/QM4TW2533766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b37d210284e91019e5aa8b1e6a155faaa410d68af3cd21041ee684bd82909. 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/QM4TW2533747.