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 0x59972e93a989196d7fc474ae449017b8f4fe885493695804ef2aebaa4376a6fb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d387944a-8187-43ad-88c1-397a0c58d9f7.json and https://artists.proofprofile.net/proofs/artist/d387944a-8187-43ad-88c1-397a0c58d9f7.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 0x677a9a3067d2811f4545356f9e1ebc680814973b71bb8140d28d93dfb59d69b6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:35Z), 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/QZJG52231549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17da6103e44cb1bd562e0efc04e580dae623ba7efaf8ace67f6e966c37d22ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:02:41Z), 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/QZJG52231550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf029007d673e4ec03b401f21f2911cc230fea29a27e89291a8b11ebb43e625b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZJG52231551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59015d70cc324d33f3504e1dff6509a89217278a4e771d81f44767bce3ab5dd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZJG52231552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8e07ea4b79fbbfa81d2abb27fd410219f7289d9751143a8552a8e4b030ac5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZJG52231553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c2d48760bd5089bdae647b3294b7846a93793d76a14f72c5392b9e96cc4286. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZJG52231555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469d658d080af5561bb1b4f3790607d09a4f1648d76c362e8659e31c0f99fce. 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/QZJG52231556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0132687104daca4206abf89ea78afce1919c846b8066c21e3e2bbaadf7d271. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNMW2249971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2cb7318d1e9d5454fb5f4dc897270b48afb9f3afad277256ae139f91e8f3ba. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:30Z), 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/QZNMW2249975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a60907675601c2c5dd5f154bc5f155fa7524feaa770dd63ebb2aa8786ed3ba. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZJG52339130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820d44ad8b6d6c5414efa2265fabe462dbf307afea729089e1c334ff55382e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZJG52339131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deab42e067ffb1a0c5e2ba4d4d4162124c23e52d60ebc65afc30da5ebfbf839. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZJG52339133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b3bcb9d55e7769a15dd06ec41ce5188263ead7ab11c2a6391de19b89c315e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:43Z), 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/QZJG52339135.
Pinkster Musiek Vol 3: Paasfees (Pesag) Musiek