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 0x51336e2b040cd2888af324ca82091539fce3c868934ab9d987d5e1805377f0a9. 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/c77f2ced-546a-476d-ba7b-ee0658056354.json and https://artists.proofprofile.net/proofs/artist/c77f2ced-546a-476d-ba7b-ee0658056354.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 0x329a2429a91d1de9576491055782ce94faf1e36bc6a92d5caed9ea58ff8db6ed. 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/DEZC62499878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13869884c0bd5e6805bcbbfa382f802977be73c8a4aaa8af4bed54ca0985cf7c. 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/DEZC62385015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8994457f509b481a11611fa33149d3c6f39754c530ee0a891e0f9e67b70b20bc. 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/DEZC62389931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285af3bdafe7f63fdcef7856e77ed490e92e114c617409cdabf31578577fcab7. 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/DEZC62493146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3e6531752e4869e78f8722660bf238482c8c2e993d5c8bff8e70be4da93fdc. 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/DEZC62499879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd23e59e4065019f03d9d9649052e19210568041df5710aae1b7821d044f6b. 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/DEZC62499880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc257ca2eec6d9137aac38b02079c47c43cf93e5cbfbe41712842aed0faebc67b. 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/DEZC62499881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13a9297b7db1830803f6057fa3baf919112d6edaae8b0953c40851b6f86a3ba. 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/DEZC62575245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91bc25fa6528d92826d721f00de9ebc8e82b47d523ee64723a200fdcacf9256. 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/DEZC62570634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817c8326c01e6f789453f0092f2967dbe4eb96f018c6a404293dc6a4eb068317. 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/DEZC62466826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a5b86d63e1e917d7985e4d5b9fa44c24ad5131fed56f0b140ccac240236019. 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/DEZC62460366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed14374bf79c294d80772747f0d447e1ad8921fcde943e38887ee49d82043d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEZC62448522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30d30205abf227f34e56026de678de53218425caa4b92223cb8ac7ce185c35. 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/QZTB22402158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b84059a5deceb8c504c0f60becddd3f9432bdefcd6522809ce8247a6539663. 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/DEZC62412486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff0c008a55100144a1ae71e6b99d70998242d329196548f3281844fdb032a98. 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/DEZC62404347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285af3bdafe7f63fdcef7856e77ed490e92e114c617409cdabf31578577fcab7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEZC62493146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8994457f509b481a11611fa33149d3c6f39754c530ee0a891e0f9e67b70b20bc. 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/DEZC62389931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13869884c0bd5e6805bcbbfa382f802977be73c8a4aaa8af4bed54ca0985cf7c. 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/DEZC62385015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d463a9140efb6744cb89186719ea35058b1de94e9e2ac8606ca68f33135e0fa. 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/DEZC62365697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4b24c2e1be38c39571fe27534e0878e34480a04384bab76d41eea994a3637. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/DEZC62334676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c4442b63b6e29a182002d92c1aa3ff23cf4b917e77051f2a75f96d7926848b. 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/CH7812345851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1bbdd2be9516f83c9c370a37d252923741e8c8855b0a0ff3211f7338c0f4bd. 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/CH7812350408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf52c10f50ad937ccfb829236272f6239cbdcf874674f0c029389b62aa448c. 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/TCAGT2351399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04763f41594890a4fc6815a55632e626b2803bd83ebb1a0e9bf9dc264ae2652. 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/QZFYX2346336.