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 0x1b60b03b63197cd55cac048a6365c7a95e519897675c98e6190fd4331d3c8f8b. 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/243032d7-9aae-426d-b885-317d4e38df27.json and https://artists.proofprofile.net/proofs/artist/243032d7-9aae-426d-b885-317d4e38df27.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 0x9e5f2d15ad7c977f68908422d608536032c7fe1dca0148296f578526525dd6c7. 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/TR0230600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc67674e01a8186e1a2dd1afc65e6f689cf65881550580546df5527145c8b3cf. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:49:39Z), 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/TR0230600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0436874644dea931b972523ef9e464fef97a93636805cdaa59f66cf4dec0f50a. 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/TR0230600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d023ee548d40aed99296b511078706643b0444b50b3bd8b8572e42f86b3a1ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0230600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84b67ebf7d2bba60072fdd30aa2581e40cdebf7b58f9d18d9dd1e25d95dd9b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0230600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda34a7c2a9c3a7f8de0a6c448fd40d87898df6bc731d0594a10a73717d70b0c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TR0230600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e68c54e6785f11e8571ced503845f44a04db61956ab602665277553ea71905. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TR9121000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d241be8a9089e52da5e0d012fe39faba8de7ed3045f0987885f43d489a28b3. 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/TR9121000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d9eade506e6d44f29c8b3b1bf6164487456c77954476965ec1c776fe5d2c3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TR9121000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1d542cf8182cedad11ff54353b6fe96b9b7663ab2fa915f7144932176dd3cc. 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/TR9121000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f9a998cace42aa2497a480df04d9992029ddc06c87034a292775e24fa28ffe. 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/TR9121400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0510480eac4ede74b8f7175b4c4319d75aaef1d0ef2df71b32a8dd1f1dd8b7e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:41Z), 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/TR9121500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254e8d505b0570c9ba163624422c3208a168c400957915e31faf28fc35297f16. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TRASM1700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b5533b7dfb80e34cc38d30f3abadc3daca11a4e61f77dccf7b4325092b454. 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/TRASM1700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcf3ca78cd9fdb42315af1ecf0eb029b078c225e46b77397c1b6c90c10971b. 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/TRASM1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b424c363a52204a8bad1c1b08c4231ddee2a5a047cd218144862dc1cfdf15. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:03:00Z), 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/TRASM1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8f34f2ee3c7e8af0b023ab64dc56ef7ec635c6246517db6b952bf917e65565. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TRASM1700055.