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 0x4dd52caad88f9a99de20b8b6d45487957e5be2b59189c3f95ef187b31fc09cd5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b149df0-ed85-40a5-8b26-4b58bd327b46.json and https://artists.proofprofile.net/proofs/artist/5b149df0-ed85-40a5-8b26-4b58bd327b46.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 0x7afb39173184a6c4ebd5c03c2ecc4b0433cb74d1aa1ec7f98a722123fc3dd1f3. 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/USLZJ2533252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3270efc534d458820beeded7f31bdd6b0f231cbd6b265b0fa38eb26c27004a1. 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/GBWUL2519846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01cd73f59bcc0dea7ccaa82417ae4010dff66b42bcfb065f69ef63a3f6939d. 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/QZWDD2586260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5fc4c79671143df6ed099cd6a790776714ccb2f4a3635960ce489b50a69fd. 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/QZWDD2586255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4d465079a439d5e5408b816a00409ae971f368d402520c2b2d3983361ed95. 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/QZWDD2586203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b29f1e63c854813717215cdb4560016d6e2f1462b18b84d8b89ae5f8499d0. 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/QZWDD2586077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5574a9ffb7a9b41911acfd3cbd3ab54be66d46d9db210191f5b93d02c1594edf. 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/QZWDD2586085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5776414bae1fc2de009ac75da8bcf07f699cb4afe2decf3d5111258ae83777. 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/QZWDD2586095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64baf298317b204b2ff85f9df853c59d02ec6da1a55b5b449b86a1b63fceed7f. 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/QZWDD2586099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc23eb41ec19dd285af9bb763bd2b955b0b82314237a2146c8d2628de72108e. 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/QZWDD2586102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350056ff316d8f3f16cf6ae95aeab224cba752d26698fb665a6f7c184a0d39d9. 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/QZWDD2586107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90fb57301be0b5499195a68ff6f87b69b80e257ae2d15e52eab8130c8d05b2. 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/QZTRX2582169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9258f741f9e67e6fe384d957c72939196669c37b04377015065c1de2738744a2. 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/QZWDD2586154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a09a15666bc92bc96a3b47f6e640074dfd5937577dadf3525d61b9ea15b89e. 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/QZWDD2586172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cedab286ba491217feba6d3827d180686375bc669b86ab4b68d09692b31ce2. 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/QZWDD2586184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4d465079a439d5e5408b816a00409ae971f368d402520c2b2d3983361ed95. 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/QZWDD2586203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe580738a2dbd7aa49e52f6bc06df512de82182efb87a1913b9af41db4508c173. 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/QZWDD2586209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcde3a4f85ba26eedecd6e74df186b5530e4d505761c36a74e36599de9fade26. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWDD2586232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb553a0d15ca2d2e1f79c9e23ed2790022ceaa1cdc20fe780ddeb4ef2d91ae6. 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/QZWDD2586234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a43b68ceabb8b5f377d872e0108c6f2589995275ecaf232ffc38c2ef27f3a6. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZWDD2586238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2814bfeac40a1af4853d838a8693d6c10bcc042caa7e378bb011cce3c4de5a. 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/QZWDD2586244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119ce095f4572c5685027a502047b4d381ac25919f930e07d40b2bfa31cbf020. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWDD2586250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5fc4c79671143df6ed099cd6a790776714ccb2f4a3635960ce489b50a69fd. 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/QZWDD2586255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01cd73f59bcc0dea7ccaa82417ae4010dff66b42bcfb065f69ef63a3f6939d. 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/QZWDD2586260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7080fe2f638593dfa18a484187dfe4d34b60ccaccca368d04515860d46e1cae7. 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/QZWDD2586261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64469f1855d9ec2d62c8b34e1d7330226056477a725226bd80c71492dd82d57. 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/QZWDD2586264.