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 0xe78d0ce8a6a1487b4864ab6d7e1d84cb18b625242d66611a090953e57fb780cd. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f740cd4-293f-4369-8cee-ab94bf7a518f.json and https://artists.proofprofile.net/proofs/artist/6f740cd4-293f-4369-8cee-ab94bf7a518f.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 0xd4611d5012981a14be3b91cba73fd09e2c380d2fb642e5c165d4cd203f6a8e09. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:24:52Z), 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/US3DF2446092.
Vincent - Starry Starry Night - (Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26afbe5ef0e58941baf3727c391351c7ee44cc13f6bd23869de53488e3c883dc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2446093.
Annie's Song (You Fill Up My Senses) (lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa127131952b32f4a889ad6c3b842fde9a61788f1523ba3c7a70f6f99dc49004f. 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/US3DF2446096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c10a141f40cc1f03be44f3e4baa2f252c3fcd745e5cf588846c84f45002508c. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:36Z), 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/QM3DF2216985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1785d16d91bfa5cb9c6e19c45bd479f06b3df9a3f27d29b0a6250531abadd1f4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USANG2484818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0487e4835e7cff3d7f38b78aa1a5b39d4a6482e7e0a19d0c6aa48d8155066e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USANG2484819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c5b4f4a3b395e1878138ca3ef7c8e789384bd21d0326fc3815127c452a3f7. 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/USANG2484820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484e2e8b4261752d5ae3d02701fd1198c37973274edc280523146f52c50b8e1a. 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/USANG2484823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47665c237d32456f02cbf692d3a6d6c17db331ff44d383c68c9dc3e5e9336d9a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USANG2484824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d27a111470b44e5e541ab896061f5aaf47712c05c1fb924e0b000cbfb9cf01. 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/US3DF2551169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76289bc6f6845c6e494e2d10db3b202004a3822a002a1e59a87e5b21e2b1daed. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3DF2551171.