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 0x763712e82cc62728bd6b1c67a1a49cb1e498a078bea218a9307f9de40305afd7. 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/617efe5b-7314-4de8-b876-0f5be4430fe3.json and https://artists.proofprofile.net/proofs/artist/617efe5b-7314-4de8-b876-0f5be4430fe3.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 0x9f979311d573b8f69d6a3bac9756c1b0e81bc1ed7a324f82362825b51e2fd9c2. 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/QZES62464098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f8f67b99d74a812ecd60848ae7f8d433895ddb8a6d1161f7e38d2666a841b. 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/QZES62464099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558496847f19f4681cf7e519a67d8ba914553d7f2ad9a2f218096955e87b0a36. 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/QZES62464103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc34a169492f3ad696323f51a9ba75408fe4f7e42b886bb5862f7b557a0e02ad. 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/QZES62464104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761571bec02c887c09f0d09097b0a17d75eca95a5aa56268a0c54022bbd237ae. 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/QZHN72291215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c0efbeb3f934b2e84317e7295e6a2f6d87338cb9ad095f198ce5fe1411afa. 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/QZHN72291219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcfa36f6c1df2f1d361855bc700b89663f5065ab89e4a6d7e428c17f665c660. 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/QZHN72291226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41425383a912097a64a16cb2bff65672340a71406d3318ab300084031dca76a2. 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/QZHN72291227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc50203b078fffae12e443366d6181e4167fe9f88c34b69df280c91f85aed7. 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/QZHN72291234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aa68ef049eef623df397fcf18fae124203192736ff6a3952be487b8f99005b. 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/QZWFH2317795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6408bc23957d47d122eb0c75e08156ea26f2f74e68ddac0b11463c2f4c52d6e7. 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/QZWFG2302239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86286e827ffd8386175d12fedc51dfafc0adcd953ec551cd88bb45f1cddaa8bf. 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/QZTB42398552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbbb65b9defdf786b4eb99e84d6b7fe90a64072d44cb45e396d65ca6000360d. 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/QZTB32315775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c73eddfd75fc6d901fb250ce789f6b8770237a25fa0ea23789ff3a29523cca5. 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/QZTB32315773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e624b03df7644ed1d7a8c16760c993e845b797bb681c27cb20720149d0e09c7. 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/QZNWX2342096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96216023a1c1305c610f1cc8865ecf12408abd5ee9af9a0f3e9615f36e29a899. 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/QZNWS2321329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cc7047fd9165ae6dc9e1d918fde4fcbe0ba64b36564478312d8c596a836f94. 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/QZK6M2357613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c52b7d2577c33261990fddf1daa34ea34dc2dba225a69cb74dbcadb032ae546. 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/QZFZ32365064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70add4f8a1da23e2b55ef586230469f0543417fa669c164c10bfd9a7cb99f19a. 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/QZTAZ2239993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e7b17c8bccfa88ceb99dda7c53fa04cc188673731e82a212d51447856d385b. 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/QZTAZ2208291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf24f4d2f923cceabf8843b223d3a61568a8af26df3c2188c011fa54ac101383. 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/QZTAZ2208292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e533103d0715f63f37f3e995648b5466eee2039c7ebc7e5a06a439336f2b8a. 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/QZRP52275945.