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 0xa3e80d921b01729cc958cfc5702c851d0bf8e292cc9e405368a6bfdce238e1ea. 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/5f0c345f-a605-4e7d-b35b-1a0f29aacabb.json and https://artists.proofprofile.net/proofs/artist/5f0c345f-a605-4e7d-b35b-1a0f29aacabb.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 0xb549b62a09b5503756fe6f4774eff98d36184f0fe2bd76b79dd0eadb488d9dec. 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/USUM70956322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dd258b4891134dd15c80d16df20866633be03d0a526ea1c9c6c0848eaee131. 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/USUM71318920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f3a4afb3046121e1abdf53ce476c12601e9900cbff92541f362f0bdf258ddd. 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/US2Q80600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef947b42b011a878072c225f6b856129ad28db8cb2307c1cc22b1b3e88712547. 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/US2Q80800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af841c6319b03692106ade3a763a90c148dea2723612278780d9e8bfaa94e8. 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/USA560803224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badd9531e750d9882f434e39f15fd3e934b796f5a725895364117181e4361de. 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/USA560803226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5024b69377e65a0c922ea8f66cc2e03a08ba3339fe4fdbd0cee55593cf3979b9. 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/USA560803229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63363efb2bf3db09336df35f927a19dcec933db97011e00788bebd30506aecb. 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/USA560803230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cd334a33aadc5eefa7c0abd41d47e4a210fb926eed9441d90435c2470837c0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QM6XS1808400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4ed9e4d02844ecd5c3f387d170b085644c732edbc1468a5292ecf395be780. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM6XS1808401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46fc9038c83443ac4456592ff330fdae901d00af2507871712e760b0dea8220. 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/QM6XS1808404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5744242182dd9f55c07440284fb1ef133667f5b382604428664792b14e7f6e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6XS1808409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2978e9faba302ab537c17478db6831d36cfd126d256bfedee97e6a7d8683daa6. 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/QM6XS1808418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01356fa9ff87b2784d4e541b9cf3807ff751422acab0201c36f6989e14c3af8b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:18:13Z), 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/USUM71416969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b639a29c37b5e5425dd8a5697d6c9565d39dbd94347c11f9287f2007603e4a. 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/USUM71416968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc8c69101925033c5bfd89e9d7ce36e25855af218f450de0c532e62ac2fa8d. 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/USUM71416977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2e993fa50f6f9bc4c3d1ae6e05dde5682aee416aa34880be4f176cc279c41. 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/USUM71416970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5e686c5d9f57904dfda8979f7d0b960bd2a4ee159185a815c586a430c7068. 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/USUM71416971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb90959bb2e24b147cacf6026da924d9ebc583a733c2f612f95c858d17c2dfe9. 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/USUM71416973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa346cf72411fa9ea3d4c2fa065e77c358312a213cbb4982ac26784e7df9d0eec. 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/USUM71416975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c4005396242d2ae90b28d4c72c7ffac8ff7352699ec31cf0f9b14cdfdbaa4b. 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/USPO10700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66dabefd29bfeb7100773067e009292e83443133c3fd7601e787ec384249ab6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USIR29000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7623a804ec9372cfc9a1fbda4de3f1cad183e80ede047303db125674c4e60673. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA370513567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc180bf0b33bc919b5200db8dafc8e57c24374c26d4801b0c4445b5c4d9b29040. 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/CA5KR0041290.