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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6ddd2a01d491df611e43529b9ac809f69fdda8d68dd8ddf8714bcf50d151ca. 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/decaf13c-62f8-479c-9235-72c7f91e0725.json and https://artists.proofprofile.net/proofs/artist/decaf13c-62f8-479c-9235-72c7f91e0725.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f533bbf8b50810dac82afe0431e24205a06f729c8293031e380e2acdc5a40eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI310912001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9785dc0576d2cae16a1425310407a455f524a3f68a82b71b1ae5d2911ae4fdf8. 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/HKI310912008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a36325fd44d532cbcfe4439dadb64932839b1709090c5ca1fe547be43e556a3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI310912005.
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 0x41e24a709bba96a804b06f55637c5bda927dfe9fad7df979ff92f06984d51eac. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI310912004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe33663e332cfb2e4ef20565b00254160fb71aef849b416f9bdae5d5c73157. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKI310912006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113d12d6ffb02cefd9df5d73d93c4e25d7c27f9bb6ca57f81a84ee7fba6309b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKI310912003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25c3bb959a759fb6a5b0e417839121758d48f8c0d1416f9b9d368fa45168a3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKD150901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ee3b1de2a3f93f9fc4505476bf803768465a33c672357db29ccf29ead218b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI310912002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94437d9128478b9d72514e64e06f7640137daa869d4da0e62d2d66525a9827c7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKD250613011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f876c25351587ac470acad1828db8d0d57669051860862fa4244ee0ed9d5ac. 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/FR96X2207128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb884a937097f8c3356b713b4a204a7c9a9cbee5be887d1f4272516402f2432. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR96X2209196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d6b5a8ebb9f10c40f9d295aeda9ab88d80c696e9c7b310fb333dd43cc0ac34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG092300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cdafd719c25624dd95c2a9a1f6ab5e7f0f1ae566b7df781cc70b7cf2b67108. 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/FR96X2224138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecabe612fa9672c4aef9dfd5bd48b630d2736495b32e461f5e570535b6d3e2da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKB129903011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedefd8f4e0b56688c02d4e156847582a493b455073871f36ce9e8bb6bee79dff. 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/HKI310909003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636e1ec8343eeb34c8c1a21fc86a2874662fa8b7cdee35226383c79a72201250. 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/HKG092300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924871d8219b0846b0c5334af82f60f3b26b86aa70a34957d6c3d50f2bc4f852. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2224140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384ec210dff2ab8ea9902e491b8f26c65eb2b362317ee0e2c0aa2fdb9dea9fd. 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/FR96X2207144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205fd8ba48f9b431504d5ded33b9a010ce3f371f4f7add113ab24423c1376f9c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2224133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa396f25f138811c98ba8514af298c38c340d07add3fa60498782137c24c8c2aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731679445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026b5d166b6a495596683ef2705282cc5f9a58ffbca9a25ec0ecc84ef23b4ec. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/FR96X2219279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721901542a8af3de06585c5ca8611e14af16c7bc282748920a6936fd3634a2e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWA459904303.