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 0xb744be7b6d3e188dca6f9eff089899d7035fb532642361c3b77d5377322e35b6. 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/4b0d3774-3ee5-4ca8-859e-89201afe7080.json and https://artists.proofprofile.net/proofs/artist/4b0d3774-3ee5-4ca8-859e-89201afe7080.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 0xba337d7d1872f9dbf25c3d66f63197aefdec1938fb80aa67427a1de239df8740. 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/QM6N22371554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e6bfe11bb24af037ac42d1da3ba0bcdd08df6197da0df6d6ded8f8e0e90fa. 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/QM6N22265303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010043335a2f97ba68347075e9af36b47394a7696ba00b412df3048ff827168. 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/QMFMF2100788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ac1b8962910c8b01fbcd5ca9002ab299f4946d16e57804499b0e196f19ac1. 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/ES71G2132742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d201d549235a8fc38772a393e496da5bc81d0176ab7dc193741fe2e091abe3. 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/QMFMG2369711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44e29379675b9e8507a26ad226c73526861daa1432c9aea71b11881bd8be7d7. 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/QMFME2454763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a685f7fc46ca650bd1ff9caf821bcc3009a86213dbffb42e13df059bda54a23. 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/QMFME2454770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328f1539abb1c97def3e5b2c20a98aeb1a71b3d148d3f282fd900f6573dc5103. 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/QMFME2454771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4691ded2798248fd947c07a56900c8ff0d9602627a425c9e92a99de13e989b. 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/QMFME2454774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02f9edb10a8888632360d00f562611f9df1050e85806fa26f86700abc01490. 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/QMFME2454775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91ed911fc087054788f05288b1dfeaef9f186e0cfd32f9ba7bc1e043dd213f1. 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/QMFME2454776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e2cddeda251e85b0f852484793b170d09e6d78494453688892e01025d6ede. 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/QMFME2454779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf930260dd3e31301bd67c4e79ce504b88dae684cdf8e4e540d12e7b85747fe4f. 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/QMFME2454782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2cf926f14b63752a87499c038dd8921e282ec0198f1aeec569d7004bdbc5b7. 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/QMFME2454790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3462b1de5b939dd638c5927faebbbb5c887c189a48e09b3252973c1b4304532. 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/QMFME2454793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888aafba4f70f4f65a35fe42278557dff75aca6117fb41d60a3e07bb03ed239. 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/QMFME2454794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaec02d309723d42238ff4d7fcd89458b6f6e7d88722e3a72e3e800e56ee726. 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/QMFME2454797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94688e2acfadd8bc271f1450d02d4fb37c75fec6b1592f1092f1bf0b00f5731. 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/ES71G2017890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d18931ac36f4ee30d1e60ef7748080b896a4d708a4e8c494f81eec9cf2dd1c. 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/ES71G2041723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03799ef1b61c66f46a2976faf57140e83c27f94781f200b1ff11d70b9a0ba10. 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/ES71G2041725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908c5866341fdaa667107f3dda0300cff2a0a9849ed7f8d86f2166e286a1d548. 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/ES71G2032815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff4a5e088464bea9e6711c51fa8fd3b89abe78b5202eb22c4775e14d19f4b0. 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/ES71G2041730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf362a1cc7a2fe79872671798aa45b42ad63efd8eb61a5daad7d0caadcc21726. 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/ES71G2041732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fcca65f02ad8719857033ab6d9640e63c2ececbc10a7faa95d24f63d25543. 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/BK4DA2401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f912f5fa38a37f70503eef53ae3eb5625b0c86e65acd44b758617d6ffcc77e4. 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/ZZOPM2223793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446c1e3cc79e052be790a4dc1fc566f5cf83a786e4d073b4550e44b48bd8b829. 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/QMFMF2145021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086d3f54aef4977d1c1bcf12ec413f70bffaefdb3baee96d346e943a5b33e4d2. 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/QMDA72176138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa337ceadb47e5e0d0ebb57a9447792d2455869c7f501b71500b4f4b2cffc04cd. 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/ZZOPM2115937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375aa6f8295da080bd2d2ffaacc2ffef56aa17002e4e2a76a85afcd60aea5936. 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/ES71G2125841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd552d2b6afa39b4d5390c86eed5f7f59c74514202009ad073b9693d8a6171f. 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/ES71G2061974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc051b7d009c804144649805484e5f0b3197b275faac0b6584f9ef321109bde. 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/ES71G2061182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ecd4599fc2d0b6782ca820e3d51dc1e45ad8b042890a59acd16c39e8617e. 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/ES71G1941271.