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 0x62e09856696ac03dc022417702c0b1581ac1b7431c3546656ff28ca83bed7c2e. 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/35427900-e65b-48f3-901d-9fa878e73ce0.json and https://artists.proofprofile.net/proofs/artist/35427900-e65b-48f3-901d-9fa878e73ce0.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 0x832a039c4ccb990e361d827280b8653075f3a914fe67d455e0437c9609fb46db. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM91012992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096e897f23e54c55b823e55a96cfd5126d571fb9f9026d0fa43cf5f89dc66c67. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USHM91012997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8489170b4c9369e1ddd8aba3b01a06da6abb9e2c8c0ffb96de4deed2876f181e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM91012998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e2f405452bcd40a45e2b897b9cbc38609569f4e46ec806ecbaa2d64578b455. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USSH51501862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af623a831ebb89c497d503803e88c1cd6c84fa876661c672054dbe5ab209c09. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USSH51501864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3773be7093f9b7b60ba783ad8fb5c6bc8b101603cfb94bd5b44aa748f7176e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USSH51501866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae65e5d34e0442d1df8e4596f1ea99763f4a34bc936aaefaa633608b424b182. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USSH51501869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc863675328eae70268ab81d319e9f7c28b5e67ca236538b58c785bcba934167d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:47Z), 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/USC4R1601406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cefa5ad8084641ce627f541c002f6909c7e63a3f305d3f3c0ddf48e9d17ce6d. 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/TCACH1562092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5812bbbcc7cb696f7befaca0f3ab09132b93e64d9351a2eaae954fb0380f0e4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMAAK2001059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e57de91a2e4913ba2deaad8d5c17f8fa454068571666795a4f3356275e568. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/TCAEP2045125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6b77afe4b623d8b93299f15d16e459da60992df56488ad124ca521b1a8d15f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEQ2085740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c8ed3e3461bfb50140021644abdb5587285a6547d631ccfdfffb3d06ef43cd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMAAK2001067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eace32972bdb0f831f9e1cb14a956aa21d151409ed38bf82e4b276b53d6645. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCAHR2384323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f3aa78f6ca39a47d2ff9c2f0967b76f7987ee8901fd7b3bd3dd00c0f4c6f63. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHR2384332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d9ba986bfe6930d99e89553e1ec9f6af873506ba4d59b079408d1ffde44da4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT2QN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf182d303f3ae28948b4ef064061f34cbd56d0b66342044ba4781a0d2ecdb25. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QT2QN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95016e574c4586f2f22a9e9ac318763b6e4ba45e9f284713dec2b9d8f1cdc28d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QT2QN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a88859930d1ef5dd4b15088b3d41d0317313964906d7b41ffea5b36d8ceef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT2QN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d9ba986bfe6930d99e89553e1ec9f6af873506ba4d59b079408d1ffde44da4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QT2QN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf182d303f3ae28948b4ef064061f34cbd56d0b66342044ba4781a0d2ecdb25. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:58Z), 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/QT2QN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5d51ce8292bb17838c3948194c7df13ff6fcff3a9175f62860ee1ec6935cff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:15Z), 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/QT2QN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a88859930d1ef5dd4b15088b3d41d0317313964906d7b41ffea5b36d8ceef. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT2QN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a21d6cdd5afe31f0393b8ca22b1d95a05d8a06aab69234c1ae09d207a04649. 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/QT2QN2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95016e574c4586f2f22a9e9ac318763b6e4ba45e9f284713dec2b9d8f1cdc28d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:34Z), 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/QT2QN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6365c9eb0fc0c2c9fda7439731bc712fb67512a05cea41d67701d1e469fb1493. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QT2QN2400010.