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 0x1ebf6adf1685dd2671b49fe09a69e804dfbdb13a7018f440d0ab154fd61b0088. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfca00a6-0f05-4d95-a18d-2d61172c28e4.json and https://artists.proofprofile.net/proofs/artist/dfca00a6-0f05-4d95-a18d-2d61172c28e4.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 0xd1ef6bcb4d39661de82296a3b423c1364d16ecc5ee8dddaae7d5762b565824f7. 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/QZK6F2491824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41776bf1ffbc77b55354c6d0259649ec02ccbd04f9355e69194ed9f6d952de2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6F2491821.
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 0x643eda8c4fcf7e2c9794acf78a1f6f091b9cfef065068932ef9e76117cbd37d6. 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/QZDA51844261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcedab621532bcedb3991d1db76415d49c41e5251410e2962982053bfaeaaff. 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/QZDA51844265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a7041340b2e335f6c1fd3964f920c685ac04ad1da396542c049a5156d7450d. 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/QZDA51844266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dfb3a6e1d20386d5595d766cbe9728e4c6df427d33fbd1dfbeb560e035a60. 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/QZDA51844267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73105b7f65fd91f0ed15fdb012b51f48a6dc9f98a992fad008604aec5aebc94a. 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/QZDA51844263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bbafabf27a74f85cce5804af8b78153a2007f38c15decf42dd7f0982f43e82. 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/QZDA51844268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107c25e06600346e81df6199cc79f439aec41fc1d9f3c8daa32c59d399e6e51. 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/QZDA52238474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c62849ed3b04e943f69c839877b9f7d24123c5ea7eba708de15a6bbc37cb0c. 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/QZDA52238476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84de8622a4f894132091b3c01e11bb23bd87fb16cdbf6e1d3fd32df6787aaa2. 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/QZFZ62289544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc52e6b35f8e9771ce72936b8631b82f89c97f2afa03913e9d0154cdc7ebafd. 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/QZDA52238481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ebfb7ecf7b2691051dcc2f6f276a3690986553eec813847997a72396b6eb4f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZDA52238475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97572f404195ffea341375a862ea55dde7c06e4a6014f2d277dd086d839086a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZDA52238478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b9b964667ebaa91566e7ad53b02820da4014fc12b2a0347c6c93dbd105b27a. 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/QZES61947801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c8d85358fc2f9df330285a24c664280a05e8d4e78d57daf5e4a743a2b173a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES61947802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e9337e0d6f84be124ee04776315de6a3b7f20d1b4a483f3e0c82e8fef03b62. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZES61947796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d4c55bfcc99854ae094be14fe881525a95a65cebfb9e39a76eb980dac8ed27. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES61947797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6eeafe03040e9619848e8d38bbeb3cd4d9a7bf477fdce57ac696a61e477ae0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES61947800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39d68e8ed0b663fe52d97a318fe15c546be19d99dc9a16863510a4396c9e044. 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/QZFYW2042289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464a6aaef127a8c84ea22c6976752dcec3f5950da4a054ba50b0d55f4dd6c2a8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:02:48Z), 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/QZFYW2042290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bc33e2e1c253132dac96e05ec4d1a0f3cdfb6dab677bc74b5556c8bff30736. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:15Z), 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/QZDA72184463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbab901bce418a61a3a2e3decd9b39a7fdeee4cc9a6c59205bd17c5f532dcbe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72184464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14735d13935e118f1b377c9fdb4e92cbbc2d452cc16d0110293bc2f55f4cc49. 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/QZK6F2094116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8875a93ed6a3ad2c7f27d6daba3adfc99e84ab6449554d6315b24542574e92e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2094120.