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 0x7913fd3d215489acb0b3561a2db9bfb14f97bca4a9fd445619d4572a500d19c3. 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/60fce923-04bf-4805-a183-33647c82833a.json and https://artists.proofprofile.net/proofs/artist/60fce923-04bf-4805-a183-33647c82833a.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 0xcc0568a60e8c2a4c2027b930ee4e4d70881a79da98d91cec0247e7e7e97e5b99. 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/GXD7V2302999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd76448908b9f67f3ddd2a257172517cdf9180d3234b8874a38d429860f3c0bc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GXD7V2304307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed29aed6e6bf70c16061e12d12a8a9d033b3295160f474a5f6a332ab3da0c668. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GXD7V2303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b27bdfaff2688bde414c88f145414f80b95c3158e79bccd821ad123136efc3. 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/AEA3A2304133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf397097e8e8272ccf0a6f6f6539f6fcec282291309d15f1e0b35a161d9945. 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/AEA3A2304254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f310da94ff3819e1cfcaa8260158dea4b5034ccbdf74b648ae6685bc3c90e28. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AEA3A2305882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557ff3a0e7e2d10a9f8c296d124e064b98053dbd92fe649431e255d187b68459. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/AEA3A2305880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef72934433be04265445c0f213f727b59241a8edd2d5b7c6bdf867c6f5a52c0. 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/AEA3A2305881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4513254bfc4137ce3a57df773e9b3194eed0d3e6c178075f4bd2271f874ea6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/AEA3A2306707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3293fa84e97d3e0c97560d77fa998fc8fb34bf29c265359403ae896f4103c884. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AEA3A2309940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118b89b453038a1aa417a02772c03daa960fc9ace2ed645c04a6f0ea05e3d22d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SGB502505972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e35b40bce6eb6df15c71784f06c650cfc28a2f84a3d026ccb4bd83770201db. 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/SGB502501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa825f6055c80cabb4b7939eb58f2653effa27d34d818fa0bec4b032bf4e48c3d. 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/SGB502505040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248ac1dd49bae4ed8c33d83a913caeb3e8df50885bda0732d97912c6978e5514. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SGB502505753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f10b5d2ef29d72b5466b98298139eca52f3341eb67d2913f305caa9999b63. 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/SGW502508721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bb988a9056cd2dcf74eebd3de517ef58125e5a99a2f64db90db675ea0cd209. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SGW502503848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a1cc93fb4ab089c92852fca1a3128d7b631aea47cffcd5af1b8c9b2026354. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SGW502504330.