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 0x1488759051d98d8b30989db2ab6e94a170c6643a6ae585c0ef1bc64279a30071. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c4a297-da75-48e2-a66a-f969ad8c1bb5.json and https://artists.proofprofile.net/proofs/artist/f6c4a297-da75-48e2-a66a-f969ad8c1bb5.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 0xc9e53083f8fb9abf88e5555112b1d29ada3c5768f965d35e744c2df530281bdf. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZWFS2463545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb72737b8c324279fab745615805ffd8ea55370350515aab8e949b3f0be0e9d2. 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/QZWFT2419042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d46c7a4616589aefc833e18d3190369f9b9a1b77a9bade53ee4d60ab32d6c2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFT2460586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fce0c60546d97e3aa9fe349d0b6aeffe4d07fd3d08b19567718a72f067cd50. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:21:14Z), 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/QZWFU2411087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82059c4836c35566fd144a1dda44dc09926c7dc3c7f5aab96a7ff61dedbb13e4. 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/QZWFT2497738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb538623f0e71b41710a918d0958c1a12e973b1b819929b2c07de0c1ab33bd7d. 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/QZWFV2402671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfeb287ad5461f08040d8c7b49876ba50dd29f158bb86f7186a4adfae7934e6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFW2462112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c05fb90044108befc9ad4e0e3ffd4aa1437731eb92d89b7ab5aa091b094194. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFW2462113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c18f791f27fd7af05204618f5c9eba35758c2412c7c7c155d8cff9f0e5663c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:32Z), 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/QT3EZ2479662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac761fdd0be85db8e82127e774a2c8ef1077da02eeed52444fede8e683f39ab. 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/QT3EZ2479663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4999be099ebdc6b60894723605762d78d4ec5df0bd71403192b63bd5c7c3858b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYX2509632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d61708c5208fecf06385dcd87095a745f3a337562ce5c85da895f3b2a561138. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:29:51Z), 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/QZHN52599042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db03d26b941eba2fcef740276f0480952866d6d2e34ec4985a7ef3658522cd. 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/QZK6Q2545828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe942da2f4f4c92549e9fd9290ab4d98116d6528d5dd528b50fcbe1dfe53533f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2573673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede506274b71abbe8474b204d25cf0166b1d3ccc6bf870b55e5660a5f20c07a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:57:01Z), 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/QZMEN2593450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494c5a92116608f6744119bf713d2f0c5ae77211f6904e4675b6b401048bfac9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEQ2565483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf720454b253698dae956b4b3af992bc231ab0f39b03e5812987589a8c140fb4. 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/QZNWR2530511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14cf4ede7c34a7b9dd200e23d0590f14b27af6f261c5ca8de93ca1591eb3681. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:30Z), 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/QZNWR2530512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380545547f4537a274260786484f45d4c63facf63f90d1a64fe409f7ca73d07. 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/QZNWS2530815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0f1869645a75da683a527846f7a1a9a41d17649e2688628dc267731da9e76. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWU2518743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b302254b7f09f510cb7473cad7a32d60d864edce7fa7ddbcdb36ec6869fbba0. 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/QZPLR2551832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4231d924d59375e94973e548658c14387c44d91dfba266d8dbe7ce5c5a1bd2. 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/QZRP52539535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaedf9e90c9434c300ef40b2369d1af280b894adaa7ee52375f01565f6ea8c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAZ2528944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f46526a125e88fd4ec132d4e7e9a2ed6e0dbf8dd8dee9a2202dfd255bc14ab. 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/QZTAZ2528945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6353c48cce6dd8a9dbb8ab1a8b4b5286110f8309122b54905342f7149d794b64. 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/QZTAZ2528946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cb532e91aff1e75f9a19fec53c457ddc9a6620b13d1dcb840340b5c6b416fa. 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/QZZ772547433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8da7c0c72a8b6dc283d32a5c02b666ee373a4aec59a5c36d31db3ed96c9dfd9. 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/QT3EY2524699.