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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408d75ae40f12ecd3c045cce17f510d12c99a72818d7e8523f09e7d4ab6fc2fd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e7f1390-44e1-4abc-be3a-218151573a28.json and https://artists.proofprofile.net/proofs/artist/5e7f1390-44e1-4abc-be3a-218151573a28.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ce8a44ed2c3a470da17d50c13576d2cbeee646c5d6745544f310d88d80b30. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:47:47Z), 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/GBFPN1021303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011449127012bb0ddea986081a594980d03fa707d2097d3c6a4d50e1c336262c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBFPN1021305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8403db7dbe64233a12c2d14d9765b1bfc3e9546604ea2f16ed0a10775f0019c6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBFPN1021308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ed919bf34f2ed5e21e61174c8891892ff703225554abc082d1e518a0d152f6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:47Z), 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/GBFPN1021311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5677ae28a36a1988ecf9b66fbcec42e76d6ef5e2c6f8de677eebc6e37fb248c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBFPN1021312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74590ec8922b19356841f7c1d701d9653bba8fec90bdffcda46fb9872d96a9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:03Z), 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/GBFPN1021314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb104b2fb98c9dc1d3ed37d2f867788040298ed57fed2d3f4a8b75b9d2ab76b8a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:56Z), 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/GBFPN1021315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd260df6037fd1dee4ad15758e2618d2fd16f4bc31797bc57dfc3ed58f2415095. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFFM1478353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19768b6c1945863761a0ea8d35838cb75460c69d491682465cc8debc6415b93b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBFFM1478348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59d54d33f29a18f84dbb33db55dc6dd2c8e09246f9fbe3ce8057dfe2ff5d1b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:59:26Z), 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/GBFFM1591995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ed0426a9abc2f44c70efad7177e8a42d3c21ea6c4b8c33717960cec4309a8b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBFFM1591986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61252adc36c1c45d5a83d95f069954937a5ec33db2bb14ec26fc98b31046335. 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/NLG620450929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c469d87b6362074da253df7a0b06947f149420ae8a3fb15b2df430a1f93b02. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBFFM2260997.
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 0x4d67e9bb8545d1462f6017d15d9bb1260315f97d65e1e348530227a1fe53a5a3. 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/GBFFM2261003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efe74d4487f2a78f78ce28aa7a69f92266ba9de69a4e345d51e1944b718b4d6. 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/GBFFM2260996.