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 0x7afafd1dc113aaa43fae7abc05e0117db694642210c4e6f2c4edfd6f7552cbcf. 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/d2e8b004-9c4e-4649-970b-f4786ba09d46.json and https://artists.proofprofile.net/proofs/artist/d2e8b004-9c4e-4649-970b-f4786ba09d46.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 0x0f9abf695409088d834c4594cc29402da35f34bb33a542fdfdac71b11bef453f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX762330930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5c08d400a64019b5d7cf0f29bbc55f7c3f38b1b865f4cf36ae70334b0acb6. 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/FRX762330932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7d3cba35fe92db7ba94e3cb52f1a86e0d0a12747119ddb540192cba392bde. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/FRX762330933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7e0ce90f224a32e3758f00a7f83e8c7ae82177f891fc7105dbd3c40d787f0. 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/FRX762330939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcddc27fa4f928d9ae3738f9973d53dc8377d4316a2acf338e7b5fade71bcda0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX762330940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f2e044964d1e81526678bca49584fda8f69ef63592e7cde7a6e3b7571efad. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX762330944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b743f9b541b67b42eac45075e6db0935030d45e60f396c0e425d865f8901801. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX762330946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b2bfa10c22f029ba4e3c3525a717c48fbc62df01b05a3bd1b90ac78244d96. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX762330950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c0a0ab5711267635922c624420af3ede6cdfd235f8ae076910278839408a08. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX762330956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b21c24f09081770f746ffd8c23f337b7bdd69b7894350d8b10b6702753ca60. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FRX762330958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fde9cbac26c540c1f41da1dc742db0c24564c2b9b04423f14776f8074d2026. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX762330961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a76dfecb47422c37cf17d762e16d6197a5b3a1c0cea74b93e4de9e0bd37dbd5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX762330962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98896ced3c4a5c6e16898f3968b603aa676e05da8d1aeab8f8f22f5337e676fc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX762330966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4e3548d3c78fdea84d43ee35cccfaae8e2a42b6b6be102a3d79fee30005b4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FRX762330971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f276323a171a64d94772833db37a578c599da754c83b33b15c496c127d38a6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX762330973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d644f08858654f42391a68c207bbd415d0637ed7c30ce9fb6f2e199f19809. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX762330978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ffe0a8eac318f050dcd95d29894befe5451f621a22df5654e8be20e1dd1f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX762330979.