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 0x441ea8a2bcef37af17443436e497878080d0532acd9f7ec770f454d1d1043e87. 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/8ba13e4b-e246-4110-8e27-a7f6e88e597b.json and https://artists.proofprofile.net/proofs/artist/8ba13e4b-e246-4110-8e27-a7f6e88e597b.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 0x54084892aa59d0fc9f4e5e45540a428fafb569c9b33a415ea57a9fc99a3935a9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR3NN0900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422fe4f3cdb3712113c21466240d60121ca69daec37fecf21ac2d29b82dcf1e8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR3NN0900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a5a1035d09b29b59ccd5fee3e7f5b2161100bb6c1e568456606e6be2739f2d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR3NN0900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65114a28f7c7a796cb7a062ffeaae6e1190b165ceb9b72f89dbdec7ac838c937. 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/FR9W10800418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f480857c20a5d1a7dca0097ad50b83b8bde0091a1a96f3e561f0f476c19469. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W10800419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e0c1695974568e2f0a31aaf757fdf4d92e5570af47a2b303561696c61d265. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W10800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd024e39e417d0d5aa897d8e8e771cdcfc1d7a64e28fd696ae6e7a67613b7c. 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/FR9W10800423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa877bd215ee27c41e7d35be9d636e17c930d2a02a0fa918e2803c6943c7f6e4d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:17Z), 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/FR3NN0900020.
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 0xddfc2b8ed38c8ccc732d2600f41133c1c88f0fe8f7b9986f799c82659cfa5b1f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:30Z), 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/FR9W10800420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0faddbc5002a73eb2e2e509d6b6d0d9d2c267ac92d5aa83227c0f5f2082c25. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR3NN0900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066bc4d4f597001ad87e7f5978171aba014fbf472cc0ab6362f875f28537d0a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR3NN0900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b58d64dabbfd28f0beddfa8ab4930b3a2f22828a2c7bf6343f203e41417d0cb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR3NN0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1317d4ab3af48df3724a465346d48feaf3be5a0c30d3721b029180142b25f314. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W10800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ebaf1a186f6caade4bd1f4181974aa73ab6670b83440aec35e98f550fd88d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR9W10800424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c594f122a933b447b564ea82fb9274c850f0fa1c37e0d0fa9ed5520b661859. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR9W10800425.