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 0x6a3857af62e791097e13ca4c2a419392054528e36665341258cd780a6a0a96ce. 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/d8f8fb11-99b9-45e9-85e7-9f0d8b6da69a.json and https://artists.proofprofile.net/proofs/artist/d8f8fb11-99b9-45e9-85e7-9f0d8b6da69a.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 0x95ae0a676a21bd77597afe406f9a06e5d1093cad8ffa79d79fe0cb9d4b2f7a48. 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/QZFZ32278931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d42a6ce179aa220c7d6ff7c3c699a753d9c64d2e20acf2e32830641b0d3d8d. 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/QZES82245978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab117b6f12ded578f9025b77e262a425f4a337d0911569d757959c9e500b09. 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/QZDA72280411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185f8195c6389899ec8ef1e397100f4bd48eb87428d38c6c21c29b898268681. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZES82245981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ae0a676a21bd77597afe406f9a06e5d1093cad8ffa79d79fe0cb9d4b2f7a48. 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/QZFZ32278931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d42a6ce179aa220c7d6ff7c3c699a753d9c64d2e20acf2e32830641b0d3d8d. 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/QZES82245978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab117b6f12ded578f9025b77e262a425f4a337d0911569d757959c9e500b09. 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/QZDA72280411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185f8195c6389899ec8ef1e397100f4bd48eb87428d38c6c21c29b898268681. 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/QZES82245981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f25ceb1b4a88a1bb224f2863e0811f81d82a8e03cc14de15118e0ce9aa3cfca. 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/QMRSZ2302147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626e08e0f64e000a589be2bcc576f331ca387146693c7d43d956646e35d7ba0a. 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/QMRSZ2301868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3160c3cd483dabbebc43fd63fda040043bd4a0beb17434dcc68e3ce677c40031. 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/QMRSZ2302148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599e05a61893ff860b3d28629908f1e44c0027aae1ba3072659cf260f661e620. 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/QMRSZ2302149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626e08e0f64e000a589be2bcc576f331ca387146693c7d43d956646e35d7ba0a. 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/QMRSZ2301868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ae0a676a21bd77597afe406f9a06e5d1093cad8ffa79d79fe0cb9d4b2f7a48. 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/QZFZ32278931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707c2cd11ac59cee4611f205c800589f4c01fa6edf5b36cf2eebed82962c54aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG2103521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aeb43e31e0bb4f5f149e137e1289c2135ba70be5e20b000c522d45ab90a9b2. 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/QZHZ52008888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca09625d4ff5e316d60fdd85b6e19fe7011e9992e8d2559eb205d420f48ef6. 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/QZGLS1987909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57b4b763fa745631efeeb752fa02f6b29f203cea478594cd5969b5004656522. 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/US3DF1829092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f86a9e189287388be9c59d2430aad09533c9d977e2f8c0424547812c261b1. 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/US3DF1722015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91652ab7a1339ea0344eceb8bf14769fe95f2b561b6490086d3c1cf293c47c4. 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/NLF712104805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf51051854ddc374a0b231410072dc1f1a4f69b144b783647214cd202a10ff34. 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/NLF712105681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406fabce95454b6e99224dd74bf7c042280a7b3beb45a8208db5bb8d9ad0d0d. 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/NLF712107793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd29d8a56b9a22b3e27b61d0508436bb614b273a319fcf3d9bc6692224f87c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLF712107794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a6eaf09efd4130d5e5875e9eeeb6aee91c225ea9baf9d77b92e35720155b48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLF712107795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b22ebc244b1f4bee13da03c461d8369b9db3158de288ce8d4fd7e4a3d280f7d. 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/NLF712107797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd107b1fef4370ddf4cfd2db0a6bc45cacc2ce5f37ee13bff538a1d54d8d99c. 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/NLF712107798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045f9f164f2ab8c251947a15cf4394c3c080fe793813bc11882513ba8ec0aa9. 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/NLF712103216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444d25bc299fb304ad1446a5ccc56d15b107c5757ea465ddf12d234daaec9d2. 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/NLF712107801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3434fc5f749ab9bc7986ee9b472ba55a0d7dddda449fd7fb50d75a055d64e108. 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/CA5KR2376295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82fb968d958679b52ceb26749acf4f207352306638dd17f20c99ae2aacf51d. 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/CA5KR2376296.