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 0x05bc317120a267158ee72acd9de165f08a516663421b800d1f38cea8da875092. 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/16ae5e1a-249b-49f1-a4a0-d8570be3df0a.json and https://artists.proofprofile.net/proofs/artist/16ae5e1a-249b-49f1-a4a0-d8570be3df0a.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 0x49de5c8fb64aaaf8c7358ae21730dca243e8cc26180b27b38f88c56841c493db. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPP401500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e881331b9638a71278414227ce9f2abc03698153e7f08af159800c54be05600. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPP401600199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d6aeca218efa7d6275171062d407abe99149bbb2c467b4fe2ca2506274fe2a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPC102400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f7925e1db81b297dea7367e8e7ef0b46c04c62f1c7a128e196d1719dcc70ce. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPP401700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eff703d3a76a6c4216899f474304b54d26ff6b4d5a4fd7bf29780acb2f6674. 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/JPP401700399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257a767689ccc98ba84646ab1266b583de5e3121c2f0c0c606248d15cf85ca9. 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/JPP401700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae536ec14b1f15499fb964409b9ea62e1177f2af18effb7c21e31cff269cc7a. 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/JPP401800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4d1819ed31a96453f754e1143fdf3f75288e6f95c15b6d03bc2bbcbe87bbd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPP401800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46db166316b70092856d902ed342cdd6fff1f3fc87d3a9017b2f032484157da7. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPP401900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d0bad88e55b2d9040bb121cb1e71fb2f787715634f0010fecd6c7e08a75b1. 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/JPP401900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a363268c4d7f600d3f28b46d5c04ed0cb5a50a81549981e0debeddae438c1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPP402000037.
たいようが いなくちゃ おどれない
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263faa551cf29cca86eff30b3a7fa698ea33edd3d05c0ddf20d7c7024f91acf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPP402000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdeb943ab7fe918d8905a66e784627332675c1073420643be98d55fca71904e. 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/JPP402000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a6e29d47d4401999267090aef47360db127c320594b6f07dc4b771de300e5c. 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/TCJPB2453319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d52d0988076acb43db17e73955d92dacefb6acaa13cf89bc97c34ff5901a6d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPC2426974.