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 0xc18849a1aa4b74d9758b7f44acb927eb4dbb99c83c489529fca488153bbe5e1f. 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/1f1e19bd-6271-4825-91b8-19af68899e43.json and https://artists.proofprofile.net/proofs/artist/1f1e19bd-6271-4825-91b8-19af68899e43.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 0xf3df12b8d83eb08ddf55a039c4255bb98106bd3930fb25eac2fe65e857210173. 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/TCJPZ2456922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1b009ff543e571d14b20b9c1431c1e01767c901349616d59e86a39bbc7b78f. 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/TCJPW2326410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b60cc491ac81cb3841014499a25276393ad04648736e90ba8cf8808623b798. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCJPW2326411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96172a2eca44ac8113632cf50b06b34811230c19c088415df4cb77dfe85b14e0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCJPV2316540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beeda275644cd5f52fe93aa13cf5c0cd5e2f7f48b546706dfda9ebd87e9bfd9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPR502201319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0e63cef3656b3efb0271539ea9263742f411f6a619952d33479bef3ac90652. 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/QZS632128389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e9774a08a8191b18f7c66f187c54e9a7cf3e5632eed571c59067ae71c215b. 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/QZS632119632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093638e440bc165277e6a9a0ef08206fcbe3b8e077b73833d9e2c689edd37ae0. 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/QZS632184581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd053cd7873056b3924f3db556ff2c0e23cbf42875164daa638a6c9b05e3de9. 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/JPI102200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc434f95df386141a3dd77286716d4539bdb1a6be65841b87d549a2dc4e561d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPI102200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a87d5cd054077b5dccc63ff839a274f94f146ee69ff34f2c7826e57d85979. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPI102200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f38ebd73d06acaf22965575cfc90e6fb1d4a43751979afd0ca5b98beb7d0ba. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPI102200193.
Sparkling Daydream - the dig account Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39baf9f74b77e0ef668d938413c625623bc19c8e1c3dc7d763acab4146a92f4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPI102200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c51724ff4425e75526b51958f52723333665b329ec9c666f8cad1e1178bbfc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPI102200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d356e30b35cafcebc221d5af2a251b1ba119a2eb4f47f4fc665d9e9e604a2a. 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/JPI102200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3401a2922efa31946a9326c88847638566268f3b5ac4909c9fa36acddcf4c2ac. 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/JPI102200197.
The Other Side of the Wall (feat. MARU) - kleemLO Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4b57988135b5b9d7e6b9431c5fbfe8c028105d8ff645e0bef3c1ac95a14a1f. 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/JPI102200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f3b2d9ec02ac78b5cb4c81a8b7aa73945dac7e29e8c1842bc79ce5a6b0445. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPI102200199.
おかえり - cute girls doing cute things Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9043d37363062099ce0a7ca72087de9d7654a909bb3c170b928088e2af7537. 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/JPI102200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1add492842bc26d3285da5f59646bc19705befaaa5b941b0252da3a349b6649a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU2273941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe719335d5e8617561d4c78062368b2169fe836954e01037348851873ad75752b. 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/GBKQU2273942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794877aa785125ed2b71e0cde08a5343f4b71388b2ea74303d4ff424727b0ada. 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/GBKQU2273944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf13af1637630be05c37fe6e8e6946143760e6fe39a6b1b61005200e09a949. 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/JPY392402438.