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 0x8bd14b3f09ed8d66275f9486368cbedc6e607b6ce2a6ffa444bd097a853d62e9. 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/bfbb77a7-749a-45d2-b167-5e6ba169c2c2.json and https://artists.proofprofile.net/proofs/artist/bfbb77a7-749a-45d2-b167-5e6ba169c2c2.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 0x419728e697181eb3d6df0fb1b1583d464938754e1007d34d920760640ffb3a57. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ0872385.
Absolution (Element of the Ensemble Iii)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b6f33bfec9b63ebd66e3d1235a43e5cf283b88cbf9f8519290e9e03dd60bcf. 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/USCGJ0872411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b7652ddfae194b6541cdacb9950e376d5adcfc5e9e9d022a641bdc1bf74b0a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ0872412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd66826edbe8b1d6e81bb40b9f0e44c52350c277a0ddc4345d4c3536c0f61f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ0872413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30744eab2a358439cd760e4857920f6689932e0766d904baedbd3a4a9d854b50. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:38:41Z), 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/USCGJ0872415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d01b6a4e37cca90c48e60727c172d90bdc3afd93210645d5bb5bce25239e8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGJ0872416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c22fbe09f5a5e4fbb463247fcbdc2d4f87c3b1790c24bba2a010d0ce758ebb4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USCGJ0872419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89001ede51f4c7e68c8eb32fb9975281f95d9b65c00564ec07132aa85d9b7ae3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USCGJ0872420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad73f02df867b15f590d8b38282da954817f38bcc30b8ca742fa9c5d8a24b7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USCGH0867380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee957ea266c64ba09596488396aa80429f89e8487e4dca4e31bf7734cf19478. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USCGH0867381.
Tunnel Effect (Element Of the Ensemble IV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185e23a86bf5a4b31b945049e74dda2a9f89b2e7768a45cc8f466173fc4365a. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USCGH0867382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5cd87cab79de5ddbf71a329027cf1e92c4715df53eda46a7a51d70adea6b9d. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USCGH0867383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de8d7e1018e9b050cb487814e56a3ae26fe7e9a9b0d5497425151a84dc9baa. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:05Z), 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/USCGH0867385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f9161d2dc3973cf671b6092b939aa2ed6e05712610343e14beda6be41f795. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCGH0867386.