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 0xc1647f6e3400d0f0ed6e53d7c019ed1e1c437bf6b79b7546abc05101024da0ee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f728cb-72c3-4105-8487-4d2def1d5177.json and https://artists.proofprofile.net/proofs/artist/83f728cb-72c3-4105-8487-4d2def1d5177.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 0xdcb74582126432db60130749fcd168e26add32c0f309598db12ba3f6aedce76f. 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/QZHN42296035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e595bc09ac66effa8996cec969f97c5a900bbf64d9e3ef96f81bea735e9f8dd. 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/QZHN42296036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8009682dbceb12f22a29ddfcfe9f03147c22e20964b3aa29caec8e0aab3c77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42296038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edc7c708d2ccbb8bfecfd0b9496d20ac8caa785a69445e8ebde8f6c4c1a7875. 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/QZHN42296039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022963f5b30f134f3b38a5eed0bda93617de709d283335cea556ff56aa5efa31. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:24Z), 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/QZHN42296037.
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 0x3dc61560f01e36d77a999d706d50c9b0b6111c10f739ae989b9c55eda72af337. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN42296034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce5863ed261f1113252f5270a1e92741aa64491ecd139c8f4a2a2b3c83ff6e9. 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/QZRP42201135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8f2c2720c5674e499f49139369f9fff2564c7be122997be7bddb6acd88a8e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZRP42201136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaec6e71328a74d3538495c0ce1c985dc22e092edf34311bbb6c14339ccae92. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:24Z), 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/QZRP42201138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85885ac0f51333ec27499667504c857c14922df097abb4b810cb1e538bd3b258. 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/QZRP42201134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009637db3526f4805a9fa33ee68c86ef9d565c18aa24d270450a6efffb684ab1. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZRP42201137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2faa3927aecb21ce13f7665f67ed9519434e201f78d33f9b6eec39aefa6388. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZRP42201139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9c394b6a6ba36b40828040336b38471d24781e4382483b8c3911de812a7a1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN92336864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37bdbfb0fd073e55f8c9037fe5eb71bd7aeda48ec074505c9186a7ccd40a00. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN92336863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f5f2b1bba6fad620f6d239551c70c2b6c173910d30715b03ae897968e97f4. 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/QZHN92336865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340532f4e1d27839d4671eeef8d09d1831453a655b9e21588fa179fbfa2b335. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN92336866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7646f09e88909b309461a21e747d7454307b2fdbcb2c72df9ac9643b2cea003b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/UKJ8H2305530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063ba1f1a3fdd9a27cc471bac9b514f33eee7c97e27d102de9a747a053e9f7c. 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/GB45A2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ced19d2195eacd83e4cb2cb66a4fd3710830377aee4f86122eb86b1ae38ce1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB45A2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940487728f25cba187203283cc2497ae9739bcbe5b3b0bd4114c268fbf9b195. 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/CAW112300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817763a40ec0492cf9e66a8c5daa00d619b7a6ca171bfca0b828ea75be3a079. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA52387204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b68ae60eff94ac1857ee4042354d8312f418935c00a0cbc136777ea2b8ecc2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAW112400369.