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 0xc2ade1f3d22f8eab1b4c60c85ec9ede31782c63149c616ef1de42aff01d6d55d. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc90587a-2066-4764-bbf2-76c6793fbb19.json and https://artists.proofprofile.net/proofs/artist/cc90587a-2066-4764-bbf2-76c6793fbb19.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 0xfcab55fd0e97295cf1f068e8580c7b8c1d2e06c363c3e56a07735a08e0c90921. 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/US83Z2135915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf182b31617fef66b0a03580d0e6ee7118f4e0522e052f782141ff9f0a67ba. 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/US83Z2135916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673af0fd0ffcf3a3a187ea2443bc505ad7636fba1421a060fd926a84e9df88a3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2135917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf692dd6f448e2ed36d15dffbf0e1b980ae1cfe5d1b9afd7306ac4b3343f15ae2. 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/US83Z2135922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4de19245d550fd117f6b572577f1c960f4243721bacc8463ec0507fdea0828. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US83Z2218524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fe6b65112a5f132e703d85e81c70f7fe2f2b7d621aedfe19783f004622c914. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US83Z2218521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f726857bf9c8e99f381f1c6dada91c993902adef6cfabfb3e15f05794b92ae9. 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/US83Z2345993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7bee267956276311dc743ed4d21695dc67c9e351236fa17cadb8a61743d6e7. 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/GBKQU2388916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78437ed7e484be74a3da08b77f4519b72092e4b2d0d885ae5a624e51f78aad10. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBKQU2388917.
8 Light Years From Here - Ivan Sandhas Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879c20bb4cf8ccca80a9ab2afdedacd87bf86e76337d7e06b600fb75b7fc70f5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac37f6bf0ea326cbb7c7385f4bc8a83c2bae5d5f51684f56cf0e79a8ff7a7c6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2212968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dfd633b6e29038a979a4a31004e45a61b4e1d0e38554ac8c8990f464a1974c. 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/US83Z2133517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae7064f921aea4ceed78e4bea26e9ec6f6b35ae03b45d014c26791a474477b. 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/US83Z2133522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd86e66b3ede17372ac083187cf3eb28490a62dc9fd7f32d8b738eb25fae6a4b. 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/US83Z2132827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eaa1f6efd2c6c98bb5ffb2ee6cfe4dcda33e740d14bdd88503ee21a86fe446. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLHR22000900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566631754272338195af556c6897e3c57e55867c060d0a9c065a5c3b69b2f2d6. 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/US83Z2240909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328a400f16e5bc3b2e98f09f49912f4b1ac2c54eaf02b0dbc91eae0310493dc1. 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/US83Z2009267.