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 0x6e8828a529d0adc2ada841d78121f5a407c2c2ca8836b7a93d72fc866186e950. 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/1077efc0-7b0e-4c51-9f7a-21d958d87e85.json and https://artists.proofprofile.net/proofs/artist/1077efc0-7b0e-4c51-9f7a-21d958d87e85.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 0x6002600cd6b939df121e7eab577c720fb491b7a31a76b82e2411e6f011e2e7a1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA72480184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e986a119781f10cafbd3eaf684866041385938d455d42cff25ae36628a8d128. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZES72471046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb27b9053a01309c0b423ea85607540964c1d600de202cc90c4aee3c2f178c2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN32470915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7036702f89d0409ac1f0042fcd7f5040fc3421891a3b425568c71f9c7401774. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNB2414102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fb62ad9c0de60a7e37f6c6143c685a4960d8cbaff73ebcc9092392d775f801. 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/QZHNC2423752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bbd4e010ad8109cb5771ea0668d4ac16e0f26a4d898b1341ad70b7cca1dcc2. 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/QZK6Q2484575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70b38efc4bab33b170be6529468e4a70a006d16da2d7df46ee89342e2b1e7b. 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/QZK6P2468627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca808f8c16e54256b6d9e6364eb7249271db70f2e41ba0dacbb2450ec79c9411. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWY2472237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461316c16e4036b9055f34b34c4bc7187a03fce8711ea974545c47cc9f7cdd45. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEM2453461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f63fd19dd4c02c2cf636f760578436fa2271a80c26fa8fb83955b8e037430. 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/QZTAX2448647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8423b1aa69f3b7c887dacbaca8dd865101cfd2a8bbfb3c8cbb9e570fd887437e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZTAX2446910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c57d8e021f588a5fb255cd57b729c4a484856ba5862babe2728c157ecaf2e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTBA2417750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fcc2800050ae21b337c0636ae66320a94d86512b2b7331892c30c0748aa5a. 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/QZWFH2419988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f27beb1d648b245e5ba059624d2c0759910f521cba94e1fb275e0e6f8438b2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFS2411275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b053eaaf03c6d1a0a4a6065da5f89fb099b2af785f98afe945a03da16dbfdb. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZWFW2473154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc46232c1f9cc5daba3a362b1690daebd5e24c46f74d9f13be8e468d47851b19. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/FREW62500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463b5724b6a0f66acf708b34fba4c51f4399a4a02d055387ff6be93a7c20cdb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FREW62500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06d761bedecc6fa255d3b928a61b77bef183659abdfdf08fa84f9ea935bc1b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FREW62500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cb92f91237acdb04e3d192c38dd4add23487002b7110836044837216ea1e17. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FREW62500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee96e8852a3f89865d78499ce010a162c40823e1b95cb97d935a3f0fcd13ad7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FREW62500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd43a958f383b30c1f09e28bb5985434cae48e6b9a2194a3b778a9bb887923c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FREW62500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea02e3a1832bcf83e88747ddc94133955a5dbca0fb4a7750ebaef7313a1c88b. 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/FREW62500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a77e50354ad910f4d13b791f0e2a1c5db53cdfcf0605ade704abcf7ac1dfae. 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/FREW62500140.