thumb|Bile (yellow material) in a liver biopsy stained with hematoxylin-eosin in a condition called cholestasis (setting of bile stasi) Bile (from Latin bilis), also known as gall, is a yellow-green
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 0x5c38b33b089a003bbc61b9ef7a6afda1327fa365eae80acfbacf809dfe3879d9. 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/d2cb29e2-024f-43ba-9f89-bd0dd161559a.json and https://artists.proofprofile.net/proofs/artist/d2cb29e2-024f-43ba-9f89-bd0dd161559a.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 0xbc013c5b4af2418c2d5747007b28ed8b08df4acb72cf727d070a68e0d191cf88. 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/USCGH1313911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e194c543b65b57ac4f41d3a2f7cc0fc367ae32d8d37a0744a29398a3a9a66. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:07Z), 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/USCGH1313912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8712f1ed1e60f02d8e976ad518aa9d879f288f22795718ff70a645f5ce13726. 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/USCGH1313916.
Regurge:a Bucket of Bile (Best Of........)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f55d883c0caa817bffabf94d53c1d79ed703a110cbb3b2134958f18e29f18. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:20:16Z), 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/USCGH1315936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b19a324e4dfe8e406e2486547d58d8e3a0c3d30beca9f9ae84d278f588d153. 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/USCGH1315940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59fc6f0947cd51c992e3943f8dc1a14ce50a5adabf7f7e1f2d9cb59bf7d8468. 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/USCGH1315943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba3ef989d5893b5232dfa3d9e46468331ee6ecc3fd5a3bb366d75b03d584352. 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/USCGH1315944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e11ae0a52d3a360df7ef133d03449ae1dd87ec61c3a05455f77f9adccc2b61. 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/USCGH1315945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44de7f48e5a3f067f786fa7c448cfe20793459eebde03d5dd68dae068837095d. 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/USA370356214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616b98565341a44b252d47d1b8dff0a70d18eedb6eb4d110ffd7d051ea063424. 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/USHM91101083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f908a0034ab703d5a2abe7cb735f8997388fe7f25c9c8e4eb5edb095c54faf. 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/USHM91101084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fe74c85f73c4c4f649ef2b3d8a51c5d9ed217ed21bcd1de9a56b147ff59d1c. 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/USHM91101086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0818acf06b3e4f11ae924a5d4d94f85eae8d5f859b92f7b1d225260f82f66d72. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM91101090.
To Belong, My New Uniform (2023 Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058bdd705c2b5a8c38e3b5ab54011b6d614a342f12c65be20172a30d6e5ffec. 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/UKXN21933079.