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 0x2d637630c5da8bdf179494478f413d497035452e7fa34aa7d536dcf0d3a19054. 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/ae1c14dd-4cce-4aaa-8761-35a12413fca9.json and https://artists.proofprofile.net/proofs/artist/ae1c14dd-4cce-4aaa-8761-35a12413fca9.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 0xcd5f99dd297f1101aefa7fb2fdda3271f68b46349dc1e0eea5d2ea5ead2463fe. 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/CAN110500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5dbf09209db805bdf9451a893a34c2907dbd7a59ca5c130cac3b9b66ab4118. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAN110500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc872cc0d4c955370ea5e1726ddaa680f2b0bb74c8efc24b8a69c31d93ebfc200. 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/CAN110700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c004bbeba50f13716d8e946c92a2639af89465d23a6e52a03e199a834bf7cc6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAN110700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa5a42942e0f5fa9f00e1a2a1ff250781963c176db4922df7f8e82ade5600ad. 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/CAN110700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650077791f4f3a7b02180fefd0d01abd3fb127cf913301eff207caf82b94336. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMJZM1500002.
Content Not Seeking Thrills (Ain't You?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da930114e647c3e54e86c415c6a93ec998d59070ded81183a051e8f72c6a89. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMJZM1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26e652d4e3463f92f4315270dd2777393f443fc8d045059800a512f2afbf7f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QMJZM1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe843db3c72c657a74cbe4f333b809edda281b878744f2d96bc42446863c1ae84. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMJZM1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5209d74b5683edcd115dbb80d1ed651e5c7acb56f2802da66767a6acaa3f96. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMJZM1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cd326e315054becacb3d38b3d10ebb1b2fd8c37e03a204d018a6b7290afaba. 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/USAKS1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8e60c31073d194a3f2fa9d93b626d88602ff32de1d80e7ebdc0a17b0e50d6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USAKS1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b6de7141e94a8c01c3436aa2cb80bdd7ea94d936025c23f1108c448f2f0c2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USFVZ1990140.