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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bc06add181cacd5a49adfce0d1763bd47c22c004857b109e5532a66b298594. 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/03a1e6ea-45a3-44d1-ad86-e3482e38716f.json and https://artists.proofprofile.net/proofs/artist/03a1e6ea-45a3-44d1-ad86-e3482e38716f.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e60224594010761b020f98ac2056d2cc9ba431eba8e2276d30ae5dd25dd409a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:20Z), 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/MYA112200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b23f4cac038a6589518f13c332b70a7e3ade3934222c7e1f00da7660e2b2f. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/MYA112300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495df36d5980d1ef4c60b134601c07dc8b5b045b48da292910e773541d59af9e. 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/MYA112300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4698c651c460103c9c54c46b9b5167bdbf6b6fcc51f721084317207beb80994. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:15Z), 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/MYA112200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036854c58c3225170f89ad9c628c9a0caddb6f5954ffb031b706bd664f2e1baf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA052453262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac24e0d1e3d45108780506f16f62c6a578e6d4c9ecc6763b24447f33ff692ec. 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/DGA0H2482370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eacae7413a13e654fadc638bf33f2d5aff4924374f3be8cddcbdd98e4f532a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0H2482371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f198c268e168eeb31318348877038e381b05cb3e0b58ada612b40baafb1481. 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/DGA0H2482372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34814f0648015faefb9da903ca30c4c0e63629b9dcbd260271558f6bdff5a8d0. 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/DGA0H2482373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245ff0cc5e6c6ba915d345e4b7c637ca354851394245b42a24810c746fb16f7. 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/DGA0H2482376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b056909745873b6dcfdb7ad50cc77a6b7e82bd8f6495ba489af862803f1a32. 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/DGA0H2482377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dd36bf5f7125260cfc46db41923254658bacff82d9c4030c630d33a31de9fd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR10S2437460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c5e1878bf1860f9d23dffd417008c747bfe18f77237de15e2c28035440124. 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/FR10S2437461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38243cb993748d48a7d421a59a76ab84ddbb93243e6d97d18a092ec9cb302860. 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/FR10S2437462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2b5e7f13635c98d323ed38d04a2fbfed8c498df2931e3e0b3d5c6ab2c8b69. 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/FR10S2437464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8ccdede2af9f7e0d80482da737ffa3f8bf755a5aae42044b1c1a0837a203fe. 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/FR10S2437469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae55c47eef5f3be76534527e4cb48cac8c577902562973fedfcebf6b10329f9d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR10S2437470.
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