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 0x9df09af6053ef031e4a81ebeeea8178182b8383cab163245184f2455667e5c1c. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39ee05d9-b516-4863-b8a1-8df8d23c2b3b.json and https://artists.proofprofile.net/proofs/artist/39ee05d9-b516-4863-b8a1-8df8d23c2b3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
NAMIOTOTO TOMONI KIKU HAWAIIAN WAVE × HAWAIIAN ~sunny day~
ON A LITTLE BAMBOO BRIDGE - nature sound mix
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 0x411eacaa7a9a5eb6b532c217c1de992c185bdb3c924d90ddd462feb2b103e9c3. 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/TCJPS2237861.
THE SONG OF THE ISLANDS - nature sound mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eaa23548b40ad7c65fa8263d63358f5a5eedec3eea0cea0a308374ba233c76. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCJPS2237896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b7895fcdcdc535c657be29a6cf7b6d95b5eb1278a46323c6f82717ac4d6c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPS2237878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff08f5f2fefbc11ad3beaaf314ed741e6c425942fbb76a9371904b445deb88. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPS2237903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8151bf92e2c85858c610ce0aace392c5c9c5487d71777732281d373790c3164d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPS2237905.
NAMIOTOTO TOMONI KIKU HAWAIIAN WAVE × HAWAIIAN ~magic hour~
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085765c4f7a0712be878852a115cf133f5bbf9afb07f1bbf65f7078b951b7fcf. 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/TCJPS2237909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7366fa3f06644bcfb33652d000793775247a28e87adc617a8dc315cbbe55d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCJPS2237911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9342a5d9f5839b4cb04047f9c90f922ead24d4fdaf4b139e983a339a1a77bc. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCJPS2237927.
HAWAIIAN WEDDING SONG - nature sound mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f82be4ef9d3e3cc07474555e7da0675e7c9f2de9fe66425ac9a9a5f32f0b0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPS2237937.