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 0x9299813e1329a73b08aeeb1afd62a8a4fb445113c3323ba5e86a99fba5cb155e. 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/f1d11553-7ed9-4895-b8c7-79e4c50092c0.json and https://artists.proofprofile.net/proofs/artist/f1d11553-7ed9-4895-b8c7-79e4c50092c0.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 0xb89e16b68ce5b2bac8788cd46f8df8fe763da6c5ebd83a44ba0c41849581ab77. 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/DKZK52100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02110a917202023440f9393becfb88851ba2198df00ed65ed6c598e5205e67eb. 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/DKZK52100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8d1b023fd87a9f03364a1e31ac8dbac4bf79c1a9927430850e7ce76700a5d. 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/DKZK52100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84e2551d246c288811483507a4356c242cf64989cb2e66a2fb9235aea646945. 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/DKZK52100614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30619a5b7dfae69c826cc094207efbb4ee4bfa5021a80ff5ebe984c0653ac332. 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/DKZK52100615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b473f2e0efdff8f37ac425bb69f0763caed92facafa416b55b225b96d292c. 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/DKZK52100616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc020d31b7bd0b14b1c62d99175a1fdfcb01f1e23eb8d1b4108859d99a40e8. 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/DKZK52100617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abee5ca923cb374e4e3e7faf878e35e4b2c22ecd425f9bb34803cc2c33a9c50. 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/DKZK52100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaf5f6b0ecac5e8fb11cde42fff3f0f672a760b4f99049d2b48c618ec462371. 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/DKZK52100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8da18f7ff181a4fc0b63d3054d74e3a324e32069cce46998ab48afd88ae491. 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/DKZK52100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969c63c62d0d97ca6cd9379f3421a7b8cef3fcf401f73d6c0bc715a515a43d9. 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/DKZK52100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd92a377cf42b3c23917d438685239e8891a2ef34992927c76c74cfc28ec8c9f. 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/DKZK52100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473e6f1f520262cdc74d966d41d57632a7956351969a00ab3553696ab61cecc. 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/DKBR21300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca44283f6c7a3a76bc7b4416c0d19c513c9f462375ddf4b80b31413bd47353f. 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/DKBR21300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1690bee69bc9459eb208fa074ad33fc223bd6927f1e2f9979a440f775de7dcb9. 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/DKBR21300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cd9fdc809a30a3ad12d807e7ec9d0ef3fa825bae595589229bf019014ae63. 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/DKBR21300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8ab2f5a8c690c51ab6820e95a143e3c18efad0611532b2f254064b851ba27. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:47Z), 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/DKBR21300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6af0cf9e43cf36e0336c6b6fba4cf0b1c1ea64d35426e9e64c94c6a5accb31a. 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/DKBR21300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fff2c4616b1d52aee78f985bb680e6785a6028d733b25ec7a82aefd9fd4b9d. 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/DKBR20904301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daeccbae818fb2e33d2a3881569463118e457c7e60508fb01279f00d66b2fb9. 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/DKBR20904302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d64e03333cbe00df7e38b613fec6815961bdbe7c12f0c25568fbf131e7cdb5. 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/DKBR20904308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3f9a7a6bd03e63c9605ce8ea5169100f0cc62192ca1c908d91ab209ef5e44d. 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/DKBR20904310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2f8b93d552353e3771b5f109b8517a517834b2594af34b1e5c477727f24ece. 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/DKBR20903501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7c89bb4ea667392a8ebf4a8b383bcb133a25b46c1ac6c96e4db36c65b4e2c7. 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/DKBR20903505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1462ee46ddfe26613eb1bf8d3bd47a8848a41496a47327dc718bc836824390b. 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/DKBR20903508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e92b7a50de6e573d07fe39eee41bc25ed67d80db84c857be7355e6bd8928d57. 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/DKBR20903509.