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 0x61e0af310a1308b2394ff20ce591f27f7e322214bea612822b78b72a0dfe3266. 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/ef12074d-078d-406b-b26d-d6efaa97dada.json and https://artists.proofprofile.net/proofs/artist/ef12074d-078d-406b-b26d-d6efaa97dada.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 0x9a7d9f1d508fbb9052551f143480cf9b453013a69e457022db20911f139cb558. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GBTBS1000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224d26a4c2e83e97346fa0f0b9f35e8f14d5ba5e1bff8797a90f1e4af8c73f0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBTBS1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e57ce3c48a76e9f2ad57c7947f4d21f7e8bef6854b20fd8d27281e088be4f0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBTBS1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9db6232eecdbd320f45464b75189470dcd51348d0b043d397ee7fbeb28c05c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBTBS1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2592529b7c055c2fe6c78621a50873fe43774ed61086048645f469eb4275664. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBTBS1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613a7701f673ce92860bd20c6d7038aa9e92fa1bf445b4a38589ab1f05a03440. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBTBS1000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedbb8685155fa156130c8a5f50fdef150410fa777e8399a4b5897762fd9ada6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBTBS1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6965763f11a31e5df83ed8b1100333c6b15f6943223354860202217bc6eef79b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBTBS1100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee4f233074b902411ea2150f53eddfe0856da77f5338959d939b6706f49d78. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBTBS1100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dbe4d2a9f4e5fbfdd8a0fb6b55993ad03c6672f89767ba43140f3c508a513a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBTBS1100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8329bb74c5309c0117b047c36476109c13fdc4ce882970096a8f957431fbf5bc. 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/GBTBS1100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06c742285c8a672b7726653e61ae25e6b027df85cb09ad7e3e03d1ad12fab8a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYW2122997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7d2bde4a41dbab5490af10fdf63640949bc4cac8667d923846072a70c1d577. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY2132281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d4ba4ab2f12ac2764e1805e0e5ec12ad5a09c4a5d70cc1cc2172a8b67dda25. 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/QZHNA2108782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb9df63b022ff1c7524dfca307340bb3894215f54556e9d95d216e20fa4a15. 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/QZRP42117941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dd0b7f762b69fff16e6294a1669f535d56853f3ef8fcde6af5968a7adb08ec. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWT2231861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4065b84445653258b86e9cc82b337ca50a173707d358bb605c71e4733e8ac7b1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZTB52244766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d2d48683e89b141b228523b0723774c3311c50461fa1f827cc0cbc55b9093. 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/QZK6N2317946.