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 0x6ce0212c4970e5c2288bf8291841e938f6b5cc6018a63f48e1ca5e0a41fb874d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9a114f6-1f15-42d4-a6df-52f07af44a57.json and https://artists.proofprofile.net/proofs/artist/d9a114f6-1f15-42d4-a6df-52f07af44a57.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 0x2259a0eddb7f7715ab0791a5354f0715adedf62f34ff33dbdb8bec9a8c8990bc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ62024219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b248f65c3cfc7644cd525659b2b8ef2cf5607a5904c12996e1b5e43841d013. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:15Z), 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/QZHN52034113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d93d0f160c6e7075080c30731ad632d9ba4e79d1fc08078be070ed16ddedd53. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWR2051753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b220d141e6e7d0400e506d4a370726d0c5932f20ec203d8160038b123641b8e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYX2150096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb242b118fc06484d4fae298a171cf4e48569a945f090c68db9d3514e1a57290. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:15Z), 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/QZTAS2159848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f902851eb2f19dd6f2560305ff29c805a6ee89647206d9fe395772e31d6cb8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAU2153269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf56d92dc4cd3f07a85e497445d74fcf2fafb0635a2dcb49369f59f062c902. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYX2386723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b2fbb325db5348fd03765541053622449e1cbed5c56f30e204c1ad2cdf09d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:05:25Z), 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/QZFYX2390833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befd468916f72096930d4b608ad983f3fc5eb4ce5b557c91b2481c75ebad65f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:20Z), 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/QZFYX2390834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d8e7adc0cf2760a5cf94d831928c447d245f4f4b68d8fb6d45bfd20b6c149. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFYX2390839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa824a54d0eb9c409eeb31919c51a9ae81edb2c75d6e4f93569698d492c1c7bef. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFYX2390841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb61af424c7ce959f2f8c4ad226730fa9e748cf99d724e7698df2e8587ed7dd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFP2447194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f13b15044bd4bf2c3c177710cb384c823768006bafea7715d6f5fb2a35c5627. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFP2447195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe9e3799aa7fba8eeda509bf859616a8abb5b208fc50778c9c0914eb29de09. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFP2447196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee19cb16ddd950325d5fd2756dacd9664ac35f8eca3cf35e1eebc6928cc25f8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFP2447197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683b1e9af49bae1b470a6bdfa14b2d478fcbf03b318f8e21349673c12225fc97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFP2447199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d2dea3ec02a825dfe9e6e624b49582113cfd942835d93aca1e1c9392c97561. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62544501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b56b0c3b17d131c092e8ab972e219ea4762554b5e6fbe39d08a3c90422f5f24. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN62544502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4744c803d4e6ce855c6ea5d94f5bbad8b7988c7d64e8906639aa1453a29148ad. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:26:32Z), 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/QZHN62544503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace904c7ca159cea63ac5b8cc143bc5b13a959575e13ee8552b2cccb13968b9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62544504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206dbf5e4157bb4c0f91ff881d538d75caf53777762515f769eeef4d3235316c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN62544507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1c484b62b505f711c25dd7803afbfb5ef7f1128b4d9d1b97cbbea3b2b55d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62544508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d46f278f5b92bd250a42dacffe30ac25b367d21ce82d7b0d1d6780b64409c34. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN62544511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e2389dfd3ad192882a0296addc8ad70107326ca156aa86b871a866e123103. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62544512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd9efe7eb5aab6414b23fe214e4d1850b1cd28e5f9454c35367c1056fb8359d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZHN62544513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b460ae723d9d6f9863b00ffd5a5267862aef5e14662bf53f6d31f6ff0fc171. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBA2586310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe80c840421b15b67ea9ec9521ba9b08372c24dd4ab2ea128f1671ae63707428. 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/QZTBA2586315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40208c474de4861c0119c5ff76d7d03377faf106213c8faee3318c8d6013d9e7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6542132879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221617b7be864279b77d8c0da686bcd172f6cf077043056a4699043bbcb330d. 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/CH6542113825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603a3be23df8d0934ca01c1b645178ef8b72d55991ddf74e849a3a8f249a319a. 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/QZNWU2226822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8cfd618187745cf58612b5365a8eb127e88c5bfb7b972bffc132c60923a5aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542113826.
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