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 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 0x156aaf7d251433454cfee100fddaf0d9f78b7433e84614d7aa98e3cbe7a09676. 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/d707262a-d94a-4eff-bde6-7f17885ab779.json and https://artists.proofprofile.net/proofs/artist/d707262a-d94a-4eff-bde6-7f17885ab779.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 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 0xb5f6b283ca18b480aa451587b9f5547deec30c6179d2d9611915cf9fef20a15d. 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/JZP921903812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6230398f80bb8fac07d7c264ec81957f903076c05ff9101a5095290a8ddf8818. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JZP921905726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55896c7ef3c7a058353d9f5f1cd7f208658a2d00a9f0b7b4342b3de4454e4f9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/JPZ922002023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a406d716c3d9f618b7ca19a27376b2d0a9bcecdff05b115f39cc694ed7a019b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPZ922002025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6617ecd8327f60feeaad5a988ab2fb7798585af4643c6d968c2fb09feef25. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPZ922002027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9b526a1ed7ee86d0c76227924980621a941c9635aeda7f4096d46d77fd316d. 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/TCJPO2156051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d18dc4b3f441b3de07ae202729d682c9ceaba4cda63584a94e56f053d9d9f39. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPZ922106755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2353cfbcca7db9afc40a27b37616dc3c0a1eca971b2a9c797842e8abf0c3a9d7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPZ922106756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249499173a06b4d156133e7cb0bdbbf3f5ee559f03e1566d376695523745e470. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPZ922106757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dac7299baa95c03aff939a03241fe272b76bd5119c253a6ef4e0abf99067ccf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPZ922106759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb516f2f481ccdccf3da9e1c8f5539c61ce5a16ae685503daa835c4aa2bbd3998. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPZ922106761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997cede60a6fcda083a317c91c42ef9b2cf6b033739b603b0836cac2d7328771. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/JPZ922106762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a441b8e8b51dbf7d99b8c0398bcafc0fcedd621465cfac0d06b50246004bc5c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPS2219094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61680994f22747c26edc45e68483f634385fb140a1686ef5a453c739719f220. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCJPS2219096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c40d4ce49d10c4b454f68e08a1d9e3451b7049551f34a7516c5acb3ca32ea59. 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/TCJPS2219103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe387ec2afb94de87b3b1feacf6844d9afde27279091a7aa9ed2aeb27337a60c6. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCJPS2219105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac603acb7648d88346b0b53a2675bc4bebec6caae982971d8aba7643b4786ad0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCJPS2219111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a4875b83ee87c02654c432c9754e21de6e2fec3e8f70597748981135048210. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCJPS2219114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea1cda0223068d410c357d3838ddbc513ea90dbbd6bc3c36909b11ae15aa234. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPS2219117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040318b71b225721b9e927fd74a7830f78adf7cbbf32e41572bdf22d4bb8c9b3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPX2378274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c50417631631dd58543a2e55aa458913f11ef19e8571d42ebfdb0b3f33d010. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/TCJPX2378275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad19b0635c33134edc816074bff78e25753577f5b29798e9a4575cda29b77c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCJPX2378277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a173b9e45540a70871bda5c45041a45c5cac4b99a3071c3062d3158bec79277. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCJPX2378281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e151b0cdfa8028c14cf3ff53e0b2e9bc76f863c5d0c254ea0b116a86fc0a56. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCJPX2378289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519aa29c186808cc5a7e59ad41f35cd09ad5cd5bba4e3cdc48960dfcb8d9e8b0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPX2378294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b97c59231ba1dd334ad436d4a991a5ec6b1440ab8aecdf434919fa6670839. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPX2378296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735678597ddd4a7b4b7494dfe3fa91f2f583fc7b8b2915cfde8ac191c6897458. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPX2378303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd694a4e609fc922302681ccdb1c3fd984e59e9ceafa2a95fcb23125e937614. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPX2378307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fe893ac93043b2b356ab42c03e31263790b49aed77d1a62f95bfbc95ee939d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPA2447182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad20f48683be16b68865e74013437731aadbdacb7fc420da078062e314cc513. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/TCJPA2447183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5acb6d5effd04776a8b30fdd7c634400db8a34760579d7e5305fef34ce0104. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCJPA2409129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc3f2f4fb852c4c600b0637af82691fcd9aaec5991cdf6d9fcad32da6a7644. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/JPB602500936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482f4c722530abae7f712293cea2b7f956dd7846bf52afab498753e5845f3fc7. 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/JPB602500937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a2e66ef610534a0e0eca11990432a8aa633924c2a536137a3f8f9f5f4d67df. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/JPB602500938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe611781a05265b783f0a92add57f834c22d1bed4762472a52282eeae4ca82. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPB602500939.