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 0x6b71d67559bd27cb724af2b08adcded43590456ed767863051c6a3f6b9cbf7c9. 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/94f4d1a9-32c6-48ce-b471-e85e707f0c7e.json and https://artists.proofprofile.net/proofs/artist/94f4d1a9-32c6-48ce-b471-e85e707f0c7e.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 0xa1a58bdac4f30c321b0d0328f3b9b4e9e125ae2e2b76f37c3da2039a9d1e5fea. 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/AEA141708434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a58bdac4f30c321b0d0328f3b9b4e9e125ae2e2b76f37c3da2039a9d1e5fea. 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/AEA141708434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e04f34ac886477a3788fc563f94f88ed780c595529e1f4e7b6bf6c7c6133f91. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:40Z), 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/AEA142103406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6892aedb9257302f3c810a07c7cc208a8f8026a997dadee8b4f60c3a7b4f7162. 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/AEA142200839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6892aedb9257302f3c810a07c7cc208a8f8026a997dadee8b4f60c3a7b4f7162. 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/AEA142200839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688b698582bcb641b035757fa6b88779f5bb9a81f73ad2bce795cc52e4f56ae. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:09Z), 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/QZTAW2206480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791fdca13e099c6826d1551923647988ff942186ea7a76d63d73077c752b7abb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ62337039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dde89c16ac5eba1e15fcb9767599ef52c026fa6536959dcd8bf9f0d06ef71f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:29Z), 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/QZHNB2385494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c1431bc7cee83f55489fedeec53881f23534dd66fed73c232e5bad51902dcd. 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/AEA142400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd90c4298e082c712915497cbb2ace122ad29f384dc2e5bee9da27949497496. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AEA142400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf118e5873cef2c05163e3aed16520807883127bbde1634db5ec2f5784cfc52. 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/AEA142400234.