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 0x0dfe89c7d961c3f63f8bc0d7a49a43984b2a4389c0288fd73528ba2612120a0c. 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/e5cc9055-05df-43dc-bfd1-f6bc1497a361.json and https://artists.proofprofile.net/proofs/artist/e5cc9055-05df-43dc-bfd1-f6bc1497a361.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 0x99ea2ab152ba3f606ae7ecbd91732ee06742f8d14f861e22560e0589f1e36767. 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/TCADG1704221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c20de72f2d451a80ac2122697c3345f621424ec422735f5a31ab2b2fbb0151. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNW72401669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d36195e14285744946c82453648476b5a68fda73d657856a18e59a334af893. 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/QZNW72401674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514fac719fdd80fb08fc8974319ed80700167baa0161d7431351c2dac47166ab. 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/TCADG1704224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374aa1fdde9dd31c8fa7fe5a436ac76c7e990d3d36e41083b6bc4697fba094c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNW72401671.
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 0xcdec33a6572ac80e641300c3ee8b034da365c0b937123bc219fe9e7a751fbf2b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNW72401670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d5134cad54fa660e0791fbba83ca6b6daff1aa32f6c9b894635bc357dda8e7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNW72401672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fd1c7cfc2d0e0d4566ec08be757e54d3627d708faa10a4080f277c40c6fe93. 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/QZNW72401673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39ebfa2cf1c098ce39615a674e6bf57cf1ab6e0ccc77a932b78b7d655973fc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP42294233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd48b711f154e237ab4f7ff9e1bfce8ed50c48428395ce47ec3bfad30c182d0f. 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/QZZ972343752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b16ac6ca745c57d0ce70a8bf998598e110b752008f64bf4f7296a005a8f435. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ972343754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaf45663e79978bda354d5b2176115b5c98a7d98f11862c51852885d2b99fd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6HN2265167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3dba9ffeb29e17ea920ded6c0dbee9b10a2a0ef16f83f4d3496c281558430. 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/QZZ972343758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17eba7e92b754d22ba32b3efabe2720fff7fc987586c1a485df00f27dfa3b3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ972343753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eac14107512f172a2b356efea3ebe774acbf300d705ddfec35fa0146966bbaf. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6XX2203568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b30faceacc4fa8e7ab50cfb691f91bd083b4c450b4388da353e6a31ff256a3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCADF1796909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0dca08e9192e5b8c0f2da7026eeac7043360021b0265cb76c4b15a295de9c6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZES82014963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156bda9a42461dc93c37734845d65668d91cbad630bf44cdb2cc350d868a578c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZRP42343416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe038406fd63fc5fef79c6aeddda6e88306ecbde97080ade4d17365502017d255. 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/QZZ972343755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8873005290babcf784b17b1f102af58c41b9298ea67d2ce01e4d3e59fc6dd20b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZZ972343756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c0e04d3a88e177a5e616eb34cbac4beb8cec451cccc9adf13ed1efa9735180. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZZ972343757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97f52582f7da05ef6e90580fd65feeb74281e17a5b36891461eff828a7e67a. 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/UYM121702341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ddf81bae9652114dfce55b3bf1dbab217997de3f3998b622a78a5971b8eeb8. 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/UYM121702342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde472fe9941cabbec98cf6f7ce946557e8b4bd81379011a81e206c31610eb4. 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/UYM121702343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b754182a6ebb2b9b1f64616a19df46220712e42126fe51d1fbe88f12fb10c86. 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/UYM121702344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd1d8e57b5f8848dcb0aceb0fac6745ec0249877fdadffdfe824523950f3733. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UYM121702345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38473ec7e44f4a38db11080e5638e8b1bee7c69de02e1b1266e8f8e95db01201. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYM121702346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b807f932fe1b9c2eb12667d74971a1316500d7a84693307817e8b23baaa8f3. 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/QZXLZ2346987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c056e9ac8afee24a0f89ea3c0f8edbef3d3cc48becff558370a67e346cee140. 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/UYM121702215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b71da08d0e145682e32dfcacfcf34059b1b1e573b552b3d3be3abf112d1928e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZXLZ2346988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415471e6a36a90791bdb622e71f99acf43420146f7717878fd6fb2464e92d502. 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/TCADF1798719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e55cd2410548383d34ef1f6b105e61ea1990518ce89e67d11aecbd9816734f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:10Z), 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/UYM121702219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34efe7f413bf8a48d445c674a2821cd1c5fa44e9f5a201f70d1d37ed05b854b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UYM121702216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a29921aa053440bd581dac7e6ea61557e73ddd695668ce9a764ee0674c30f2d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UYM121702217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a5fa254a57c6720f900fd937562f438606be1d71ae6b123fa436a2b153d894. 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/UYM121702220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a57acda524e11592b05daa2e2d2a75ad6423be7ef1cc1d600fe63a354d0eec. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UYM121702281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea730b2504900d5415cbdb678db70592afc5cfc6790a631e78ec552792e54f6. 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/UYM121702282.