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 0x792591368804ce11c2b4762eb19b136931843abbdc9ad5ed552f2486747afa69. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb308166-59bf-4142-bd32-cab1f33460a0.json and https://artists.proofprofile.net/proofs/artist/cb308166-59bf-4142-bd32-cab1f33460a0.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 0x44636e6d102946e99a3803992644bcf4e9a58f26ed2c2644410650e27b4781ed. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:15Z), 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/ZAAMB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91279ca74f3a6e4a80bf4a13046fa2ffa1690af799a05c5347aa0689abff9f21. 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/ZAAMB2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893b987b4835001523835a71f0f531d995deefa543bd65a116ec2c455f479e30. 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/ZAAMB2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aac6e06228f3ada3cbed8d5e36aa876fa4f3127e6d35d58beecf3adc00dd5d. 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/ZAAMB2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e3a8bf05d2e94ac2b089eae685409d8df2fdec45150448fd2d9a1188c6acb7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ZAAMB2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870cfb25635fc6a43ed9d2a23a8f46349668c618d6a10c33d17f47f1b49104fb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:39Z), 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/ZAAMB2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba9e4105b975ecdf82a850711bed6b642638bef3b0f167aead7bea539f3a442. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:54Z), 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/ZAAMB2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63ac75b9b702b5b99ed010030e8cf530d1747abe9ae48bb1ffb9b8a02b15f1d. 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/ZAAMB2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e7e6de761d9117325c71ea2b8d87b4b636a05083270149321bdfe976e11de5. 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/QZDA72286355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05068aa7b697660f69ff17fb93731ccef58b563284aeae5580d7eb2b5e7d96. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZDA72286356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6815ad945249f7cdef8958d6283395860a26ce407051b25d08ac4c6aab36eca0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA72286357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c6bfb283ada9ca386c42a140e829e87afd0c923b345d9bdfd4c6a94ce9abf9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA72286360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971286eb7afa3f30edaf5747b961b06e675bf3bf2603e101b5a9ae0fe55665f. 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/QZDA72286361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005fee21df9cb62d3a0f3063fe0b36483524658e6da5de589dc670480ed2c981. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA72286364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd980c23648e428bcb3f7743450ed0ed66b0e3602ee2bd9b79f802cb1ddf0e406. 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/QZDA72245425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7044386acb8a4de5422938a78cfe779c78cacb373fecf54f519b6dbea9f159e. 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/QZDA72245427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48135d5f46aacbaa62689478be620b5103e6f8d993242a7c916a5917baba8952. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:58Z), 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/QZDA72245430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61424cb208cc8cf721212e36a6c68132077fcd4d688569d3042b0cab0604ac. 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/TCAJL2559348.