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 0x2e8afc203d889a0b84f262619ba1415124da82b3f30c9e85f8a09a35b2658fba. 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/b73d7aa2-f42c-4b8f-a8ad-f1bf1a274899.json and https://artists.proofprofile.net/proofs/artist/b73d7aa2-f42c-4b8f-a8ad-f1bf1a274899.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 0x445d3cf352771c1ffe9ba684d191df0d48b01dc1ddde66e2d4b5892784ddd6c1. 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/HKD012315387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e59c2abed04eb587baae2e1c495b6882479dcabb02ef88dae862d5ed636c2c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKD012315550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc278e9bd78409931b929f6bf935a39ee5fd74d875df704665d40f18b7fda57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b38cb3e3d10b68d9ea40146f4ba96f6eb378256bb1778bde41765a607c319f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKG732100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa06593224873302909f03f8357f37f5805890ca3c672102d97d305795c7d4e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062340975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a2c0adb8cb4fb58416e90f3697b7c45fbb0ccdb4a21b7636875f244ad8e37. 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/DGA062340976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37f78fb25ae491bd22ef0b2a3eed255d8dfaa416bdc5bf14dadcdc71623bde. 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/DGA062340977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bce798e717ad582c44dd6a7533c6668623663eada1385637e5488fa31174b. 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/DGA062340978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b013e82ee539acfbb112ad445c6c88706ab9981671a55da411b45352080f0c. 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/HKG732411979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2541a42a3efd316f48dacd542070ee249fde8515bc49adc49bca9f5788e2a2e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA052487166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c1b680a7ab90239da603ad6c69798541be29864d843bbf4b37539152eb82ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0R2329078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925eed3edea81a58f69ce689a3e1c7f5b531f19fe943d2089c727d99a03d576c. 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/DGA0P2389488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f792c297c7747a15ab43e0571a44f62057c814037f9e5305b9989be8c8dc08. 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/DGA0P2388176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643058dfddac8b76b8670997dc08be2441b434d3bd55d6fe69d1a036aa8f0d99. 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/FRX282232868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344968497df64732173714a747757fb22312130c55366acc9b229f900fba8c22. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DGA092360244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9353bcc15cc7f3363165039e1ef17f31615f17cd9684be5d0ac54d3aa2ed78. 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/HKG731625018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb954fcce97634749e3f81a853ab665a27ba1da905b72b80e987a18ec7d667aa. 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/HKG732269772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b0a67c6853fc07d94139e9dc902d7b9e075ba7650cc8295bd706620ba9a04. 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/FRS182134840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea1c12ec49fc69f76848d7a72ef1f6346fd9441724cc215ca18d6975fac4e9d. 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/FRS182134841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f03ea06a44231d234f0d2f478102bb9edc9d9e596152aeaa94477f0256b8fd. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NL8RL2417660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564a9d3bee4c1790c72c87c8965aeed7e4a00e95c54fd4edf5d1c446f78b7803. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKG732142482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f331638a00c59358eac98f963f77c59bb02e1b4c1ad4531aef316a88e1ed53. 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/DGA0Q2352484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18e75d39415091714a256b7b243f3c45972a95a5e3e5cae63d5417f2a7d3a6c. 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/DGA0Q2398687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cafbce16c3738e83a5d5b729dd753bcb5144b3e9b2a4cf7961a8ed0a1c0126a. 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/HKG732272769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4126b2901c70b21b646360a68439382bbe89203622a08d57d36a39303bf23d. 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/HKG732272771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c023565624fc493564d666a51a4b670ea926ba9a37c07b0468abf9a39863dd8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR59R2287417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ccc1fe255052b52af79b0e31128f05936e4a605d0eceb95c04d8fa2e68f2ed. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR59R2287419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab01bbf073416568b661d31277426ec9ca778b501e9b2eca73d7ead14d7edc4. 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/HKC992425889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7619e63e3de88286ab173731ed48d77104e54c42d4d283cb90c636f6151629ee. 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/HKC992425888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301c74a6e89905f41d485121d121eadbcd0de0e995f8fd866bfd08e93934b54. 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/DGA0L2374868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1ea8f72fb3b69fe63ea8c0b60d0f950a4f3b35459623977073042fe756861c. 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/DGA0L2374870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9340537143ae4aeaf3fd3a3874f8fb4d0418adf18ebb565f503c2ab3898be8b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRX872128107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d624c8d6235bf0d9eb5388e5cc3545eae13eeac23e91e838edec383a5fa8801. 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/FRX872128109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee25d0f1c6b21b5ac171ea59b2b009f3e8ead0d56e107fdd415d0ec4471af02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732469912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe194333d6207ca257cf2117106e9fe65d999f54dac9ceec437cfa13eb88ab0f4. 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/HKG732469722.