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 0x7436b0fb02eadb9874dd01d043b637fac80a8adfa6b9e147b0b49ddacc4c4e95. 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/af8eeb36-10c9-41d0-a465-dde4055dfdb4.json and https://artists.proofprofile.net/proofs/artist/af8eeb36-10c9-41d0-a465-dde4055dfdb4.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 0x731dd098e5e93375f98f967f256b0af53fb59fe5114242dabea771faef53d9a1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US3DF1986801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c547c03ebcdce854f78334127adad0264cb9bda08a611eae88b2729629d425d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2001901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e75275bac9b015d5b4ff516f068231ea26b81d542c22be1bb097c1feaae03. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US3DF2055781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d14538b93abf55ce014223a630e84495a572203996df626efbaaccb0fb080b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/US3DF2055784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566facf5dfb386339fe8c9cc26f744f2c643ef743b2a200e3f481e3f85df4db3. 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/USANG2159675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac980ef0ac2078850f4e0de45382acd066e2cc88ae257e3b95897ee59b2356f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USANG2159674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702844c09c292cda9ee9fe167b6cd4e3d5a114578cbc22e201b59c475635eea6. 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/QM3DF2182980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e743931d503006700b78dc639ca2bf2d86aa04278ff91260359c00c9bbfdb61. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM3DF2182976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4325b79cf8373363344ee8aed89f625f31d298ce8ffbf56c87adc1e11bb26fbb. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FR2X42251612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf6e49d42e5b43dace8ec0dbdcde432be326c6ba1052b673e5560e52ef75b4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FRX282234597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa930e2d271fd3ecb4df9ffdf67a72737d5d78e853e6326688f32ea224d3aa5a. 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/DGA082212442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c60dd6efd83176104bc5b5be10cf627e03779b7abe12708091d16ddfaf1409. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2341132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292c8627558f57bdec66bd22089ef27dbb66904109c2767b602b8f591fab94a. 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/FR2X42394476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1a30b539e8080a0aeb2c6308bd83f04e083f99f016d3fc2f43713475bdd76. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/IDB832300191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2842e8906ee9240828f67cee2d7b60f1d54e4d9a3564c743e62a6b0ecb845e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FR96X2309455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44867dab67c38c029596f2fdab2b331a48d1e78a88e985d791a23ee1d87a4559. 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/FRX762396475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0260e60f0c9f3f877eec57adb3834a30421567af415bc0c0507957d376240ba. 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/DGA062307380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58795be22d160da4493d92fe7149b6f7820a5f469fcb4af61e33ade0bdab4b1a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DGA062385033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e9c80109a69c823a3dd45ced5f0b1c5429711096282e8a25fc0a3d877a2f08. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0R2314713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc3f711a6288a6cca5f96c0561c4d1dcfd3518f96de9099e8f545ca2400d38. 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/DGA052586188.