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 0x0871c31b3b5ac8da39d96882f6223a2720b56b33a789fe145e82f0c9aea2b9b5. 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/3d7f4669-9a87-494e-a546-56883e6ff57b.json and https://artists.proofprofile.net/proofs/artist/3d7f4669-9a87-494e-a546-56883e6ff57b.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 0x53fea5e56a7fba53e6e22331d040230c031e5085471d079bcc9a41d701978e1b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM6DC1751413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb47a79a378ef7406bfb25494cc474bafbacae7919fc8d50a90d4ff49ef9b24. 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/QM6DC1751415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb660a7f143b77267ede3f3f60c766df7451387b1edc67e162585bb735d1113c. 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/QM6DC1751418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f72aedc9f0e170f5d511555b24b1596c87147052373e41e6cf4b167d421864. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6DC1751419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad8aaf16c62b764a13716e1a44b16052194d1aa62f4837f230745ad5ba0dcf2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM6DC1751420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c51c77e11e932fa6f456596caa12f31e025f8d6a517d3a77e8d006d41d1532a. 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/QM6DC1751421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095ec9b33ca02436a3719b7d487e5e07019d5179ca005c232f04ed421be3630. 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/CA5KR2051872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3c1f46e3e5850b4102b7b3488f85d63d5b5e892fab888abf2a4570e3bd9761. 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/CA5KR2051874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedb9b039888a9e1c7d0e42b30097c89a99f2e0f39f11356b7b5825ea43e49e1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2051876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e232191152c6123ad728aa8f1f8cf1712e26a96d7ef9c7cd1d54f55ed1229. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CA5KR2051878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c054a8976f5c47cc8976952cc0142410befdf0dc3f297c3e2ca869332a63ac. 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/CA5KR2051879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e41864666900dc60806767917fba244ecb7ff1cec3ba4126f0cc184dcfb4b9d. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/CA5KR2051880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4460e665314574629f7681b48ba1ce36df862a1e99bd6a210778e9c4404155. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CA5KR2051881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c709d3c2df4d391374a34e373f69c228ee028d6306564768f26d565e0a7c3f0. 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/CA5KR2051882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06884b09e221d9ef3b33631e35bdd8552f5f9cc86fc3075172662a4c92de5d6. 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/CA5KR2051883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4cb4d9f5c573f987a0b099fe973bcaffdf00bed43d9a7f81a00000e88367a1. 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/CA5KR2051884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1641e5a9e26994becd10a23d4785f63a505d2af3986d5467f4c8446d776be49f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2051885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe5e53fc46f85726d2b5830cb435cc72e895949eaeb1305da18a8237d114680. 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/CA5KR2051886.