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 0x004c0bddd614e05896e6a534d12447241600637792b0155f5d397883eab9384f. 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/ccb37525-0c5d-4a9a-b606-7d3d8315eb13.json and https://artists.proofprofile.net/proofs/artist/ccb37525-0c5d-4a9a-b606-7d3d8315eb13.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 0xf91a8f91e74ef476edd0efe918b3069e9b91bb1f6977e7e715eb884cd79ee66b. 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/QZK6F2200946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d05f0a46ccadaa6f56ffecd3089464fc408a4c66329e57272c257b71eeb69. 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/QZWFG2376910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f606cbae3e809db6ab03adc7a3e1d466319374fd3dec756422169701c1718f. 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/QZTAY2334271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce59697d3cbcb7b290ed474a9435db325852246d400869546d53cfd4687727. 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/QZK6G2336967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a9424d3bbad623071c91d70953040f1966cc705e4017918219b3a70bde5c6. 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/QZFYZ2388017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa147d4f55f7e9a03b06223ffc7438f8140ca0f580b7bdb8fab3ad35ae044f. 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/QZTB32219491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc882f09a7642ec48bbf5dc1d941e942416d720d09f4c91141e036332cc561b3c. 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/QZPLR2230016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d609e127391cbf35fd96e52d5e99210f7b51f7918115c708ec2f762ae30cfab. 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/QZTAS2418652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704d33e8cd9d19b8b21fe1a5b482956848ed10d9947b5294dcb2c3210b50956b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN82475757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f606cbae3e809db6ab03adc7a3e1d466319374fd3dec756422169701c1718f. 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/QZTAY2334271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce59697d3cbcb7b290ed474a9435db325852246d400869546d53cfd4687727. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZK6G2336967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e8b3c583f62abd0a4c4b9fad5d91d4371a718ee1fb79d3ac9407df8f3ad74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNC2359850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a9424d3bbad623071c91d70953040f1966cc705e4017918219b3a70bde5c6. 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/QZFYZ2388017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa147d4f55f7e9a03b06223ffc7438f8140ca0f580b7bdb8fab3ad35ae044f. 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/QZTB32219491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc882f09a7642ec48bbf5dc1d941e942416d720d09f4c91141e036332cc561b3c. 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/QZPLR2230016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e64bef3a168a57b6f703ae598da6b97769a8be12a17494c9d0d7986ce2193. 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/QZNWR2085858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd130b115040ee772db981c945ee0d25a47a88b294a37dbf406ce4ef4d46064e3. 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/QZFZ71985793.