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 0x18dba24f972d57b5f30ed45e039c4d970842d27671d3713d94f8607485228a06. 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/8ca32d84-cdbc-41ae-8996-baa95257ec0b.json and https://artists.proofprofile.net/proofs/artist/8ca32d84-cdbc-41ae-8996-baa95257ec0b.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 0x49560f34a458094db8081db60ed1863227f23f241f25ebbd163a0444dc4c319f. 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/QZKQE2000709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2ef236db1ef6912da0d77386e5287ab1d66b6ecad7ee7b1ff4b11041d690c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZKQE2000702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf14f2ddcac5139825ba42ad888a97f1c25d2848f4f7ffedb90a304497a2b2b. 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/QZKQE2000703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b1c6359d773770f92f494394c5a92a933e6aaa79f3d3ea0f3f1a3d452aaed3. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZKQE2000704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b8f36bd1f65d3ea30c21cac152cbcad09dbcbadc0c7f1795e4499893bd0e40. 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/QZKQE2000705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324ef3952f2f8a504303a803bda77010abbd1c610a6b67a6eeb97dd9ee3d808. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZKQE2000707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9a03d5979a9843722916af1cc482d6ca62b03fc53bfaaf19ba4f5973bfeb8d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZKQE2000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1451c3693eba4a7009121adf2622c7e0ec79b56e256a9a00afa51ec47ed3b4de. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZKQE2000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565c6f73f0ea2a4115d4567c789b912b9b84601f6cb7d6928752c79a688f6a24. 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/QZKQE2000710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74be9a3ae10c343c29a4f7a9b4b0e6f7385ca043ed4c8c2c92ad5fc13b1b9e7a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZKQE2000711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57863803264c0f8113bc2a7216ff4c170d6130a1a50c5695579ab50fe406a6f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVIC1875001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f8f4c004cf871480cde4bcf0a2a6004172cdd67d931567560716df1cb5bc5e. 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/USVIC1875002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed84701db4d55159ea7efda3674ab2a0e0810fe016501a54ae4a83031a8f7e6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVIC1875003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7acfadc9ce8551db6d5a837eb9b36b7909d2b5b17e5e681660e7bbcf853e655. 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/USVIC1875004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8fbceffa874dd137ade0526c5b8db6989deafcc7e1f1b1f7a17c26223a8d31. 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/USVIC1875005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31acefbb077e5d8ad92c159f266162e27f7be314ef6bc71d71e159c7b57a037a. 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/USVIC1875006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e48dd33877297a396a5469c2302a410462a08b4772539158e535523d81824. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USVIC1775099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98283162ebac43bff15ebaa8f46731f2e216df9f50f7a6d63adcca94fe2a7c3. 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/USVIC1875008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522047f1ccec991f6dec097bad3d5cfa6037b901979ca05f0734fb3cba10de1. 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/USVIC1875009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ff53422ad9a1f6804518266f1f812f26518f6eced91d654d02948fd808333. 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/USVIC1875010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0da26c313ebfbc7118d1da961d7cbd1f87cbfa38faef85c8f795517b5b46b3. 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/USVIC1875011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1451c3693eba4a7009121adf2622c7e0ec79b56e256a9a00afa51ec47ed3b4de. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZKQE2000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e48dd33877297a396a5469c2302a410462a08b4772539158e535523d81824. 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/USVIC1775099.