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 0x61c92a6f15eda1931d7fbd091e59a4d53c7608e10b1586850dc52f95773dcab0. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4499e026-f389-4d8c-a503-4256d08a6d04.json and https://artists.proofprofile.net/proofs/artist/4499e026-f389-4d8c-a503-4256d08a6d04.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 0x829da9677703d5638221a0331c859c61ddeb94f83b4979bd6ac598c900361a3a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPK2050608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b5fc33e7986d592ede47bb67a1e70961dfb1cf77445e9ae9be4c1b28e75671. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPZ921715142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb4d062291029e24bdb191a217e0ce5f5be321bf8eeba9ea095d193ba874c6. 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/JPZ921715137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fb6d57c5a50ae5e90d049d88e9a0a983d8a1b895b6c8a2c8103c5e666fd7c1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPCO01900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0ae73d180aa9363005459b2fa94c2f38067db52bd7761fd2e3f01e67c4ffc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JPCO01918630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d905d0e45b9e6c540b761883f2722096fa4eb01296b02876c44fdb46447db66. 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/JPCO01923680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77515fe2bcb2f2a42f67a2a704778cdce366c4e90ca962117391bf669cb834e. 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/JPCO01923710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71057ca2a6f99cc721dbdb84474b8d9e6be3463eae7dd0d26f49ff1161373732. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/JPCO02010690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba4859571cba38b99c9e44dcde7259a83f042089e978a53aefd97945f2f5092. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/JPCO02124360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6534caa9143b0259eb5b7f390d0800590f901b8774a556dc7898d303edd78d. 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/JPCO02124370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121cb7dd9ce637cef6e25734807f1567ce5f983e2c187bf0fd4b868c92d89d4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPCO02212220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030834ab81906043e9c11f3b74aff1a29d6ed98e4270a10dc854d3d68bccf25. 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/TCJPZ2444182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06bae4aee07a4884a5881ddbec66d9478d5075b9f2c8629a83e2238d9888944. 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/TCJPZ2444183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18849ffed980c04fff14eea4f05e153091a7db0c766fc5bfcd815e077483e70e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCJPZ2444188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8b0e2731d9d06ed61b14c934c37df0582afca3e96e117192572f4f8c2384bb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPZ2444186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d17436b158698ff7051bcb09b74f8b5f893a9b5d32c4737065124726c2428. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPZ2444190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7bba90d78a986b3540f7fb1806a0a0190c8c6d0923423d89738cda0c47517e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TCJPZ2444191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf030834ab81906043e9c11f3b74aff1a29d6ed98e4270a10dc854d3d68bccf25. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCJPZ2444182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06bae4aee07a4884a5881ddbec66d9478d5075b9f2c8629a83e2238d9888944. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPZ2444183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18849ffed980c04fff14eea4f05e153091a7db0c766fc5bfcd815e077483e70e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPZ2444188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d17436b158698ff7051bcb09b74f8b5f893a9b5d32c4737065124726c2428. 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/TCJPZ2444190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515fdc2171749f6e6671fcfdb89952e9def57cb2477c7eeadd5c1b21396fa2c7. 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/TCJPL2510955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82550056a20e46aa11dc5e996e30da4fe7da8a77eeec9ed73ed8d51423fc701b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCJPL2510985.