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 0x924d3cf6836e73b327e3dc56b456d9d0e44b73a6e2bb5748aaedda63caccd31c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3468657-532f-4def-91a4-ffe55e3c6d89.json and https://artists.proofprofile.net/proofs/artist/d3468657-532f-4def-91a4-ffe55e3c6d89.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 0x02d5dab5a41d6a1aacc8c83168fe09a5d7ca0dca62e176eb59ec4f204c959d68. 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/QZHNA2015035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f2ed11619edb920896f4bea45b85210626d833a8b94d7f46048c5c34410c31. 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/QZHNA2015036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ba2bf98c497d9efa236f9cd6c9b3e71987405b150d831dc8a1deac01eed27. 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/QZHNA2015037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5516e001ab8464e4d4dda44870f3b1509b3d303837d57271bc04194e54517073. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:57:57Z), 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/QZHNA2015038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae10fe52a4b829095e4c952bdba2c0aaf37b215a23dc1108c366b7e71f6521. 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/QZHNA2015039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb997c8b2e3f33b4fe2f842e0907201af7984b23ff2fc9cbc8d3c3a4fb0a4cc. 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/QZHNA2015041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28af94b0b240adef64bca6f902d0a75641e0d4870758f23f2bc1c9b9ef59a1b2. 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/QZHNA2015043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e87c0b51d28f1fd2f1109a149fc98b7feb128dcf20f3a3c2df610bb21703de3. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZHNA2015040.
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 0x06aa867321a112eb22fe664cb82900740b64335deae00df7c960568772afbf2f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHNA2015042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe29a231b768c4c3d3d0d13bf07f002000e650a883e2b75b7b1b381fa0565f77. 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/QZDA61886052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc61d3cb733ce070f822298cc5ac6f56013d60bbe5e8be9c2760d117dca692. 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/QZDA61886053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0118f3b7da1057cfb0a6cff23b815433b1bbbab171456aa27e190c8f572ec7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:13Z), 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/QZDA61886054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f477ee729edd2b92dbb6481b8975fbcc4fee69b19ac183f33a91d5949399b. 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/QZDA61886057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058afdaf4558672d4a8693e70f14bc8e2104a74fcc72a82d61e3dea410d29de0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA61886059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe29c791bd068d13ecb093e2c64a8fbb46c7daa5d4a7b5f7626fc682415e183d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZDA61886055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd06f13242824c59ece4e3ee2381e93891d51992a7c763ec6429b3f0b08eeb2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA61886056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ac888ba4e1607d89ae20009a75e68485e35d4c97ab9fa109c5cd84bf2903a8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA61886058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd5961fb945756c77c062766dd64458150d807579f4a9b16b92f08579b5874. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZDA61886060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a8b0828b0fea409772a60373661155d3a5fe9f50833c11d2b0f6a4e8b17e5c. 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/QZDA71819006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736de6572feaca0c48653514197d6d95ba50208576a0afa3fdfa57bdbdc9dab. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZDA71819008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7329a071d1757712aaa065e579d75ff1a5a39dd5a4466f804c8ee04a958d2c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA71819014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6767d903a7eeb9e7e2dfb5eee9536eb954aeb4c5b8b74c219990d85d194bd712. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZDA71819007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabe21407b395f79cd0ebd28ceea54fa48fb43042dc24490acaea1b4b68dd0b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZDA71819009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668979939c596e90c29b9a87c07f79c1b2653b4411829e051ec4b5a560165d52. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZDA71819010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc932757d2fdee3fb7991e6536ec54464f5398497aa4076ec47a4b3bb54880. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA71819011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73e6b2cc4382c3e681f3f6413baed4e1ecfeb0c7c5e3c28cb64d7244b7a8644. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZDA71819012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94fa45377c86c6399055df2d2b19d9a8c5454beceee27ec117a1dac37d2cc3a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA71819013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8582add008081db71f140597169adefe356f65fb4a148c61239a0ffd9153f. 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/QT3EY2430686.