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 0x06d41b242ea6e0ec74c0b630af9e76dbfba14058640f9638dbb50032cbf3eba7. 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/e651c887-f19f-4f16-a026-4ed7b8fd5fe3.json and https://artists.proofprofile.net/proofs/artist/e651c887-f19f-4f16-a026-4ed7b8fd5fe3.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 0xaf765c56c869c65e7d38c82de3f5e988c08d4789e97e6a682cfd7f5ea9a2f487. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAFZ2272730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66d4290bc774eb78670e9cfca55e4aaf373676d02c0507a2d1929c5af1e355. 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/TCAGE2244345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41baee6aa3ac924c65ee48de05d64bc032ee5e4fa6d9873dd1eae9d447ad5f02. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:02Z), 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/TCAGK2212771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b652ade0d98873aae59681367db4bac327e462ec15c664797a98022d2c48d3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAGX2332930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bb84985d868fca3d6b62b4130265e7275e120da9eeff65062328495babb28b. 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/TCAJO2565627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c133201fda196e816d093653a7c977aa69b40ab55735aa65677286506bc6c. 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/TCAJO2565638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ec63a6e59daf5e27d7f15e7553cc23761444956deac8317d8b4ffdf9f5e946. 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/TCAJO2565648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09c0020a59cd9fffc008909fc24044a06df6060f4b944e9389fe50c8aca47b. 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/TCAJF2527297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c2f96181ea653ea15943db2f97e48c9c6a5151a6e2aa89aaf16d62afe721c5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:04:21Z), 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/TCAJO2565689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7659fcb35f1c6040f93153a4f616360a87ca1a73932ecfad50511d14900e624b. 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/TCAJZ2511613.