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 0x0bbbf66f1a8141dafd152df50887d52acf5bf72ef2282067696613b0d450bb2e. Chain 2 (Bitcoin): anchored in block 954010 (2026-06-16T21:41:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33e42f50-5f93-4f34-8e31-215ebf170703.json and https://artists.proofprofile.net/proofs/artist/33e42f50-5f93-4f34-8e31-215ebf170703.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 0x8e3d467ff984129cb71b92c100fdf6871950b58c64a6104b5d8797d451bd2993. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2401921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935a9e97f74c5723d0b20d42f6ba4b7109978a5441eb1f91b12c3aabb629bf2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2422948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f94aa218d52bbadda3282d5a2e8a97e3e051707af6fd6368f0f2b4b2336fee4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2422674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05dd25245d931807d23cd7415f8568414c162b1ac037a4dacfac788112d55c5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX38U2405468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92a00ab597b74470f961848e6d008b5b8a1406b6c9916f70664cf6f191d4a1b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX38U2411392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc4cc98f2ff0e5a2f4262b67ff699ce670bc382720c8c536683e898ebbce9fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2436873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39130c8e7d278b2efa3291be66de12bc0acdc9cbdbd0a44d316389eed437d1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GX38U2470238.
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 0x28487cc966baaf577ee35e66f3799afd30842b5a8768e064cde70518611161c9. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GX38U2454349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d652be2f70e728572ca4eba9b1a4628155b6f9b2473472f04ffc37941a9ba2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX38U2456926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6c219a17b508432e12b878281943b97f39c2cf462af02d409065ec9a08edb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GX38U2442688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1045f1b09fb2b11a1d27456a979902bc0362e39bc8a8ccb941e64d69869b35f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GX38U2433205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b83c8904da7baa4bf8c72b9d16b0dddbcb2c49bd1633922907ad7b364364d5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX38U2456201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0727d3339afee1a93d2379a41885d91823e90a2c590d56fe92778ae64cf363f3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GX38U2456287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db341c4152b020d4f9377a1b1a1489f1d1e3c0532b8649865ecb4fead71714. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX38U2472803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad25f0a03764d277db4eb78714fd6b8aaaab93b7c92e11db95fc0e1355301d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GX38U2419893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe992b226eb9761dd3f7e4ed261175bb42c84354d0db6cb2f0db44a664da65561. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX89G2258616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdbd66fbcd4117103494898f0d6183808cf437e3cec213ef79a858f644f60c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8KD2216847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce221d8756a7c4877467d93d0c7a38e5f0b5d1d2a2fc3edfd37d8d4dfdffe1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX8KD2245112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb73fe9040f6b71de6caaddd2e14d471269207ce6171e53cd2c3045fb333d88. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX8KD2245109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94c16a8945f531c43c4a7e10414b472f49155b28b23bd91b4856755e4d3dcb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX8KD2262283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76bb55cfa6e82105ba3895ef44cdda0bda8229a539cd5359e2b94c1e82d6a8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GX8KD2245113.