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 0x076183a2567e6ccc1bd22988b46bdd64d723e32807945ce982ff1f392fc08fe5. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fd20c37-0565-4e4f-b950-c5d5f7f5922f.json and https://artists.proofprofile.net/proofs/artist/7fd20c37-0565-4e4f-b950-c5d5f7f5922f.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 0x509cd1393cc0d17ece2ddacdef23527b41ddb490b156aa8ad60dcfd5f3c2dbbb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMA22597824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5d4370cb1927fb6cd30b1c359f96ecee5d2c776ec5b9f7d77331cfa6cfe1d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBMA22597825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30072200c99c2bf668c672dd265a70865685622683f3dfd527e2eec4bad83c02. 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/GBMA22597826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669bc9a43b461836067080ceac78f672b6595b4bd83b68d5a55c887f9effcc7a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBMA22597827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb437bc3b8f5dc416af263a1ad213826d927012a29583c61583d41df2636206. 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/GBMA22597828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85a5dd8cbb5f6b322625af69854445802f167e575114d10d3bf36c5be257c7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBMA22597829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18058a9a8fb71f49b1ef6a2cb70f73516143574cddd9fb66add76431dbc4d16e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBMA22597830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a740e5d6615b439df9e0bc2aa6847a536f8c414865a1da5914f4e329bc06248. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBMA22597831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa027ff279c64356678e2d2e62acec906f8ef301f048e3e0fdc006f1ae3da6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22597832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc32b20dc2c93df915f9b5d53f283b26bcb6f90db206d02caba462d853dd72. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBMA22597833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2a5235d835d88da1254189bd5eca90d01e92ef9ab68a15ec14f7e2f2a98176. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBMA22597834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1381ca1e0998ea8b3ec5f72b6d264308270c237bd9110e64f3edbe85592ea6a2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22597835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1182b18a58e70912f0e92d977bdfdfea2458b1fbc9978d74ed990de7761a4be2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBMA22597836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd294a45b8014e34c802cab69e59c9b313b723ff58a270eea6d11b2ba923c883a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22597837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7eec690034fc6af98848202d339aff18280e272ffb1f3995226fa6adcb40bd. 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/GBMA22597838.