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 0x0e89e7d511408119d7f9bf97641fd35cc6695002b1d98934209c3710e974b2c6. 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/3cb3cbb8-ee61-42ee-b377-2ddfa79d5684.json and https://artists.proofprofile.net/proofs/artist/3cb3cbb8-ee61-42ee-b377-2ddfa79d5684.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 0xcea84d9e7495bb0b85e638e4a24129e01771da8b11c4f92fc6628a55478440c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ62193054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a61e6cb3ac3742ad41ea1c7260c501d09539a7e2b7908cf82070edb9aa7b25. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ62193056.
Rain and Native American Flute Vol1 (Rain Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2696a8ac53aa8fe0673819f26699e163f2290c55d89c0368b7ebfc3054edfe52. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6L2115471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e84b94136353983d20bda936076de28078aeb5c2e4bcdba14869ded7e1c4fd. 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/QZK6L2115472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11255d92c4f7b3e8b2586951bd232a44203cd54c6b35715840893d185e0ad44f. 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/QZK6L2115473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468ee61d6830298b9b4f28e0d7f0c441c2e1b559ab6d260a9821bc2926ca0fd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZK6L2115474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fee43eec89b69264e13a55b2cf75f69cc66f9725906698608c1f9729481571. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6L2115475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95c16c295d5eff4aaeac92fa3b1e7fb01a46bff7712149a6e0b25cf89babd6e. 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/QZK6L2115476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c5726b0b27d26762a093d46a8ebad2f26b331c0afc8075f9f00e831377548a. 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/QZK6L2115478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189ad913e93b26e7f8577a6d3f562994337140b131cbdb1629fd89622691fab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72298767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1f6842bc8567b477ae7c565337634c3c156a52c869d1f6b4f23e2dcea01ae6. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA62431592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16adc6ee6357d0667543931aaf5c0961cacd5f3467db0905bc4e4cf427eb8cca. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZDA62431598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbd453d330ac96ec4e239056ae4dce305c487f97d1d5c928712e5e8cb7c8fe4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA62431599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9f6e4a994e7fe5106c0d1778bf105cb3ff29e65736464fbffbfef6a2901d1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/QZDA62431600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b424be3b3df9ae56857b78b71074fcf1a0e5cce9866c74c36dffbc070f1188. 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/QZWFG2460375.
Call of the Ancestors (Native American Flute Solo)