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 0x21ba241118c2b610e4aadb20dce06039b6b6ed600e84bcf904c5627493c72ee9. 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/1ebd34cf-d564-45d4-98e3-c286817153e9.json and https://artists.proofprofile.net/proofs/artist/1ebd34cf-d564-45d4-98e3-c286817153e9.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 0xfff25ddbb1fc1596698e85321b3318787e524427a336d41986295cebcbbad4f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKLV82100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5228b3bccd2c68fcc431aa7e3303ea24146eb4908901c498be8e703fe07d5bd. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/UKLV82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0029d81a908ba4886cce077909eb5b28e98dc27077ce2f582ce12c763e4528. 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/UKLV82200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc91a69dd150e54ee69c2626b86597083a93b04819743acbee06826fc5b2e7a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:19Z), 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/UKLV82200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b9f0d481d05562227532581fe46b5c4498b2372dca85aa807cd4cd4beb9da7. 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/UKLV82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b9f0d481d05562227532581fe46b5c4498b2372dca85aa807cd4cd4beb9da7. 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/UKLV82200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0991eb571e032e4a516f38fe9fd075f6750192cc56bfc20c65b3b6d86947bc1c. 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/UKLV82200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9832c5fe743f54b82547fcd484fc98c5046ff58c333e2100f6deda11aff8780d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UKLV82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f267bf292d79e611624e3c45d47533f7f8a0493d72dadc8f52495f84ee38f2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:41:04Z), 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/QZ8GX1701749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4421499c74ecbc4858b49a5685ac550b2a3c645c54ac0e3b6645be7b95cbdf60. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:44Z), 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/QZ8GX1701805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9443045cc59fadca7755a447542a7ea4a056dd6b38c5b387951457609f668926. 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/QZ8GX1701887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe425e83a76ee567e42d2c95435119e6c33b484a51af1016dc71b073d25d7a659. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZ8GX1701919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d58ddacf6fae0874396fba86d4a6101f2465bcd29f007508212551863b72e41. 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/QZ8GX1701998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367a85dc4bc4ef85d02a72952c91e733a8e9fac9a90a1ad79b6d1df9d0014115. 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/QZ8GX1702022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241486632a7ca957affe745f1cf5a5cc01b983270a6248bab92c7f3e181c860f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:59Z), 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/QZ8GX3702049.