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 0xbca4a6c7fb452dabf01ec3b2c2a46ebc2de97947ee8c7978feddbc792c3e1ec9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1616b20-ec17-4676-8918-343aeb04bd8c.json and https://artists.proofprofile.net/proofs/artist/f1616b20-ec17-4676-8918-343aeb04bd8c.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 0xfd70ad7133929fa0096c18b70080b1203fe3e523db480b56f5332047abe18edd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAEW2095614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8841c4ad6684120b96385653538cc26ff3e7a73aacaa412ec663b8abcffeece. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:08Z), 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/TCAFD2042411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf1ef11782d0c481d61cc99669ff54fcadc1beff9937850ed55c289ebe4c021. 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/QZES62155871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e13015e976e9fe58afd6bee0ea0045c318a8a1730001358501fcf717bea0e8e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6M2152009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdecc6f9c0ce6b7de2d565a8c5f8fab6b8903d6e30254e6a2bb5bdca49cd2d2. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:19Z), 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/QZFYY2481585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20a787b42b5a48eff52649dc0cb380273aa47c1de33f6ee06508114d6e15b84. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYY2481587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44651f98f50d52e78d117d15e91c6122f14425f60394271618d2f0d99a38b906. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYY2481588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6284f3b717383a513007fbaeba903bc09d52bef4f5ad884a34fc056a39374f93. 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/QZHNA2424119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2a716f57b49801906a88b4d34903bcdd3d0a56a2a0382dea066ddb0f1f578. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWFH2417728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f747d07b7cb3c018ba7c0dda0d08390b8c8c3e232e563ae75985868bb44aaa5. 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/NLCK42420707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2a716f57b49801906a88b4d34903bcdd3d0a56a2a0382dea066ddb0f1f578. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZWFH2417728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec78e4a91f6accbed06223540a62cab12f6d03108677d1b543695ceca27d19a5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZK6G2451084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c9b7b362ec42e95d276d96f4ac28748252022ad9223a4e80349d0e66e065bd. 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/QZDA52580010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29345f526c11c8cdefd3f68649d17732ec06c549c1fdd7814cd1d3f98bd08540. 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/TCAGK2253871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a077050b3e6983b6fc5e45533fc6254a34bb7e8d3e86e0e231889f41b722ab9. 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/NLG662000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3618cda49d6214faf6212259725bf31fc14637f1d8a348efa8f0f6f4ff7c8ab4. 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/NLP1J1600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7a040b5e1c4e47cf51105caaf2abca3775ff3275dd457148a82df3c0238772. 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/QZES62501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22c20c0f7cf62c88a6e056862aef8892f7b4605a9db0c15ee6cc083cfc7a8e4. 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/NL4DU2000509.