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 0x4b6926b4fbdfab93022cdf33253c155891710d386ca38f6cc1527c2ae4d84f1b. 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/8fbae4a2-59d1-458e-85cd-6c516ead694d.json and https://artists.proofprofile.net/proofs/artist/8fbae4a2-59d1-458e-85cd-6c516ead694d.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 0x7ee4b07db39f7356017db5e44b9577899230585725fbcfb3467deb9fb7076dd9. 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/MXUM72101712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01fc675af95955705e8166a54884c0e445d7daca5f205574769e831b308b11e. 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/MXUM72102276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d5bbc12fd059e4309496ad05cc747b165b53035b0bc564609be8b5ebecd58. 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/MXUM72102543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161991a4ea51e880a7a35fb2c18d3044abb1aafd3bde268d33154b65cf28c4d7. 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/QZ5AB1783487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c7524a01b1f8db15f151981e340d1ec421af0435533cc0281d0dabfb0dd58. 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/US7VG1989094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2603f2350d53452e306dbb9ca5def19a7e8fb3cf18246d006e25adf1d8e52cc. 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/QZHZ41955840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b347fa6b39745107595a38b9d2faa030ed58a84f33d7954700e13c08ee800d. 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/MXUM72401669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66f86733af06e5b2082a03800d517821139cec61c482f8277404d8f1c0e730c. 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/MXUM72301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73784f67069f16d4b66afaa865c7280d8f8b086d618779cecfd58e8bda94e50. 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/MXUM72201299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd06becf751c7b30dd7400394db64f472ca7cac689f0f051d38267a708a943c. 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/MXUM72200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af467e5b14c9956fc7b0dec81bb0407e39bee6c741b69934076144e43d2b819. 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/QZMZ92130160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f20cc4c7c046b47db146fc680ed73f16345dd16df35035b37c8d406620a2ebf. 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/QZHZ61904869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c7524a01b1f8db15f151981e340d1ec421af0435533cc0281d0dabfb0dd58. 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/US7VG1989094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f8e92ff11b7c7aa9aaf096ca9b2ecac665272eb6c351155050c9595f113956. 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/US7VG1742778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23326c8370c736931eaae352e2985cbd5e2eaa429846d2f0a5034e224185e23e. 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/US7VG1733903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ec96309828a4f599646bd7121f21d7ccc24fce3a9e08f0b56d45148dee404. 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/US7VG1746690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014159f5a603547bf588ac72f8735bfd369b3bb7682fea4c0df40f82d8beac5b. 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/US7VG1754639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3269814efefb8f4339a6ed38ac090769a3b1f19a1a870b7748c37c69dc05295. 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/QZ5AB1739494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43ba77ff497a464cd44b9767d46634c2271e748ec45274349cd37f878aeca89. 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/US7VG1762688.