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 0x6d9459a58518490d6e777df1f535c49634b0c7a184fb382f9cef8b8bcf75264d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30725034-a6d3-41aa-81d5-eaef0a03c367.json and https://artists.proofprofile.net/proofs/artist/30725034-a6d3-41aa-81d5-eaef0a03c367.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 0x2ba1f0609ee351a90589db1539f782ab73e80670c34fa47e6d6d3b6cbeaa3d0d. 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/QMBZ92023399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29312a4a94530edc5987192e06070bb02413c025ecc91588e179d1851d70ce0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:21Z), 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/QMBZ92023404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd18434ec189ad3c7507955fd08daae288b17e5525fd6424d911822f546294. 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/QMBZ92023408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a11b02c160e3976ff36b9b12329ba2cb0d7a9b8ceaa9029c7095d04b1fa2b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZKDK2257131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10224429df8004c36d0618e8613d26830cc153fcc490ffbfc8644fdef552716. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:38Z), 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/UKR6V2253570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1436194b40971c922cc6682f73e4af2195b7324d7876a131450aad4229c9a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/FR2X42540239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db78b831e2d1e7c16da27068b3e1f6c17a0943574e6f2f0633cb96adbf24958. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR10S2534918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4cc49815f33a57b5aada6ac22e6d2c698be35d468198a798e00d0be6ebd803. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FRX282423939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025cf44a55f476f74372a24a0de194d6e7d43708e31f69357438b5303da8bb3f. 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/DGA0P2436727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f1436194b40971c922cc6682f73e4af2195b7324d7876a131450aad4229c9a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42540239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa5aa022f6bc6b647b2297990b1cd99031337d5cd0f3f476e02a472cb24eca. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR10S2552872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b89c5b9da19c30201a5fbf52785fd02ac5e05031a155a64b7495568770136c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:05:10Z), 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/FR2X42555019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618fb3af4070942c53035a8cdf85939d3e5420d467dc6c9a1f961d59491b0a1d. 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/FR2X42555021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1323053732f6c9cac16a2e5238a62f3f38af4767c229ceab23701a6208ac50. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBEXH2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f8578dc8ebbd2b6c5f77881c5838515ff31eb934b605af6f0ba01f47da8222. 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/QMBZ92284013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1323053732f6c9cac16a2e5238a62f3f38af4767c229ceab23701a6208ac50. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBEXH2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c81a01eee7e75d3cf3fc9f841b0c98c25a0f4b78f17c2b002a841a69fe2ecdf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRR642301336.
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