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 0x953c0bcce21fbc662f7f28c4ed36a255784f3db08fcbf39d85395820b9175891. 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/20568c0c-e75b-47a1-967d-2f01417885a9.json and https://artists.proofprofile.net/proofs/artist/20568c0c-e75b-47a1-967d-2f01417885a9.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 0xd52ab3ed4a19fd947f6f4adcb8cc8811e8d912612ec1d9d1f9323f81731dd76a. 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/QM6P41735253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990e4b3c2a04c9c50060d812a16a1d17f5a36e027661cd63a0aaddd3e19964d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QM6P41735256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf17980a24095351bbb02ae6a30e6c58c1f079f52739fec06b5fd1ef9aecfc. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM6P41735259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab5f5faba030668a50d9806a01ed44c7f62b3fb0796b47dbe28cff73b0f258. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM6MZ1999466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a1e451e850e367346788929b924a675aa478312db3d6dabb15eaf743fd648. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM6MZ1999467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ad82c98fbf93d08f190171b2067b34f2b35da1006517a75d043011ca220849. 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/QM6MZ1999469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6c72f030e88bf0c8808a12e7fb77e1611d27038545617cbc661ad8b1daa343. 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/QM6MZ1999471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7090bc1d3bd3f19debd967b60305c4b027a55dcba6e0e33f62b277a932d5aa78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6MZ2197068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4eda26372d822008fa252998935a748ed9e358802b309b555afe5c6fcf9bb8. 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/QM6MZ2197073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed630e9a33ddaf13c45db6885df62bf93c0d1333c3245b312376c44572a1e4bd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6MZ2197066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3615435495ecc74dfe4099cec569549d0b90ec626fa364c8460ea3b88dc9f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2197067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7090bc1d3bd3f19debd967b60305c4b027a55dcba6e0e33f62b277a932d5aa78. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6MZ2197068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34fd0766778094828d01a6b5c53fa8ff05c7bd123b18f0b0e4e0a2bbd56d27d. 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/QM6MZ2197069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8a36e48793f548c7c404c19d317921099cbc9bf6694e1a512daf8deac044e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2197071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4eda26372d822008fa252998935a748ed9e358802b309b555afe5c6fcf9bb8. 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/QM6MZ2197073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd798708e1ddb3a5cfcc92ce59fa8aaacb8001019e30b711e4a3d712126bba79c. 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/QMDA72336564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5811afd3c277228f361f9bb2e9d3051722f5b2c13185f6153b33bc4ebf3ce5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TX2566479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5811afd3c277228f361f9bb2e9d3051722f5b2c13185f6153b33bc4ebf3ce5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM4TX2566479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb61dbd71254316c3d016ed085d448d9cefea3b02f148cf639f5772668365f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QMFMF2321275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2463eca6eae420f8a342c967d708ce858ff20429eda38f2c53cad13913eeb79a. 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/QM4TW2475975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18efd0441290d44e5e25749ed0825dc0a2a8544916a0e43d2a5c595232e260b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM4TX2566483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c7d03c8bfe96b21f0a3f8ee1a0a1be044d50c4dfb7db68112423fcd8140a2d. 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/QM4TX2566484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e91b2313861f80c15d3421ba082f1f1a55cadec6b5ad986c2eeaa9422029502. 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/QM4TX2566485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38d88322585d05f48af05a99fcd12b247b347736fad76a480d119d52bd8799. 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/QZFZ22144933.
Artoffact Records Presents: Post-Punk 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d0b362e38c601588d9f0466b7a289cf6250b165a0e332df57d7b31af9ae6f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM6MZ1999470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5242face288b80cb669ee6d2eeef4ba09c7bfcef1870e9442683e581685de6de. 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/QM4TW2417105.