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 0x7b9bda515b10d6d9358039ef734ab8ee0e53c964c0d7af4e5772494149034740. 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/08237aee-3fba-4407-a35e-17870c94fda9.json and https://artists.proofprofile.net/proofs/artist/08237aee-3fba-4407-a35e-17870c94fda9.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 0x3c7b1887b0d760aab39608f41554dbad3d5952490ae37a7697b26d7877f7a6cf. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW1503065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a49fa20793ba3e13d718fdecb745f4a1380ca5c5462c1766b380d9bb9d2cfb2. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QM4TW1503071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16423b4952242bfce932284a2af8e12b2b57f8fc9d0da876c682fa83c575cb0f. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QMBZ91566065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3832553f04b6d8b40e9b4a949653a6f0edadf7b463f92fc623e275f943a055. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4TW1503094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c46f572832ca0f5340845284b1361c1238e9c26f7c6e203f5e2ae74084ae5d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW1506400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e38b4a043aca726b8acc7cbda59cb1b5c3f86abdef81493c5d46feb33f06318. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM4TW1506356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799475c384c6bff046aac0f72c36932609034825f8811e577db43c2893789a8a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW1506360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd34840397c2072fa7ea4bbb36aafe4bd1107cd077521fc1de798d36cd61feb. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4TW1506372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7c30c2b0ba960ece0de1a4b5e88444bd8bce42f40f19db5798823c23c137c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW1506378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267335f5827a954c389745d900fa90811653bc16ecaa5eed7de4aa85d491c7f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM4TW1506381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b146eab7653d1fda099b155cad9603c655c792e393039bcb09be757208b3d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TW1506219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d5fb44394d91c8cdd74bd44eb1fe14cee459cca80a8717f04c70ea34e7b01. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TW1506222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88207dc73c0b9d50ab5247da73df80866e878dfbe5ab8099d80d75c5879e1684. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QM4TW1506433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1967da49ca6602abacce139b75eee5d6ca96ecdb585e0f5451cc0643a4e5b107. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QM4TW1506434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19498824f0e3508f3093f17b86c6c802f7b6c782e6e0e00bb2d4afb793c477b8. 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/QM4TW1506436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164858f0b4aed1e65ac2d9473bed7aef38f2dbfb13f75009c684a7c983d16a96. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM4TW1506437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d757b92d2b4f9ab9dedc07597845633e3d68e79db529b9f1529cf4ce1dccc1. 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/QM4TW1506438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080364bee93c2729df8ea11e3460e3d2d630c0afae17d8d9044bd746d03814f4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4TW1506442.
Concierto de Alabanzas y Adoraciónes, Vol. 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea72bcea70fc26c79fd7599ff1c250532bf45b39750604ba52f55f4de305f5ea. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW1506430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa701d65fdeb17aa3de62b53308036726433d6d931c069920431a332596619272. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM4TW1506431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c600b345b446307409ded633956407b7c28fe742c2b20823363b23c178c32b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW1506408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82dc52c32824ea4da38ba31cfbb79228001d5381c63a72b46c3e22203717cd1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM4TW1506412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713a9d845410f4dc5426084fbc5fd553fa56cc92cc8a70de29aa089ce478a33. 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/QZ2J21513928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713a9d845410f4dc5426084fbc5fd553fa56cc92cc8a70de29aa089ce478a33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ2J21513928.