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 0x1e61f3dfa73d114fbb8ac2ca4775fe7a68757b959e6af5c5430a04606a2a0895. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6bf1d2f-47a9-4c0a-b092-56514e976f48.json and https://artists.proofprofile.net/proofs/artist/d6bf1d2f-47a9-4c0a-b092-56514e976f48.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 0x3f134b14d4369712badf7bf0290a84fa54948e22e0bf9b0a997fb876ab27ecb3. 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/QZS652128553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944a3c58091d3965c445a70805c1e79a4d151e4b301f836e85dd405f5541db19. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZKDK2071604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52caa9d167a2f51814ee53fba68c260199dae9a6ddff3b3acf4281be903d29ac. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZKDK2087348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b00798d64688166e9f5169a042274553fc5a7e2bcd41c8e43a8811b8766385. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZKDK2019502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcce820f6238c83b219682774698ac66f56696f0ee3cd7453c556760dc48114b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMHK2287830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a50ddb5ac3f837dc5d6d56d21d0b5e4b52644e160c77a453122175805e2378. 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/TCJPC2439116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b92da28067f5748cb83956e19cc4ce2243aeb2c0da227b3a4cdea2bc71c8170. 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/TCJPC2439117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181a25257c38af17fc94c25171b1baba7aafe33296d51de6b48cd141f958083. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCJPC2439122.
Crab and Pancake and Hungry Girl (feat. chinoi momone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f7dde68e141c609a0eef3596054bfbdc6e4d732b66dbb7ba52c4909f77bbb5. 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/TCJPC2439129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96a1e943c4a1bb84335b193bcd7276f02761eeb88fbd3d3c955cd80b0fe2def. 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/TCJPC2439132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9e40199f0dcfc08f8190cc6177885f7a0167f7a321cda295d9a60b66110999. 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/TCJPC2439137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a6e9f4d89d0b5ca44b5dcc3ec2ae361505e4652df61dfea67f9ee121a32428. 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/TCJPC2439149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc317cda1c6860e2f16d040b068ceeabf9fa366e71aec7468ef6f0cb5942edbd2. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZMHM2595250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91a562b0eed29bab6eae2e6a5f2eb59eea299eb88683461c24205ded297cc6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCJPD2591651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef5c23335ee526b352b451080369a9e821a98ce4eb6bde5fca2d3ae19658c0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPK2510966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62076033f1eabc994df9b98ba5976dcd52b367812aa55f0bc6ac8024fa02daf5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM42K2394416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2164840d2899015a8f5a7b5ff6310114f8e9be2df90dada9fe5e5b08502777. 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/QZMHP2325031.