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 0xad63acfbb6994685adc91f06ee6e95ffc288bdeba016166719500229e7281b10. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd2fb2d-0838-48d2-a44f-b0477edf721e.json and https://artists.proofprofile.net/proofs/artist/ebd2fb2d-0838-48d2-a44f-b0477edf721e.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 0xb6d568a38e99e95cc71adc9182be1c33f4f44248f5d120c96c606481120b4ac3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAJD2585394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57315a7c8f2d1f47fffdb1266b348f553365825cb60ff23d450580a497e8ed68. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAJD2409263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dae8462303e4e7659d261a2e8dcd3b9405508060b09812aaeb3b0508594e85. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAJE2452242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd178376a073d36dbe5e03ceee56bf652586b30aed37b73d9c67faa4c4c84507e. 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/TCAJD2598407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa901a2aa0e9b409a4bd8f43ce4367c7e430984ccf157512c74b95fd129ffbc6d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJD2599190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5100fc48bf7175f15780a1dff0360a04eee9a9fec076e7e545f0832b98472048. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAJF2501626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554f89b898b16472fc5f21631107d9fec6f5875bde7f0d7bb2fbb00db1b8c7ed. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAJE2528973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cbeab872a21286d9ddb738ae39d92d5d3fa6dc251de0bbf4818d465c7df288. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJE2521482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99fbd807deae4fcc41d4fee08467661e8a1238d70d054e69629c8fef2181a56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJE2567270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0235323cb327aded9cfd4be63d47855f54c0c5762ea25db8171c3c6059d5c80. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJE2558496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf82ecb887984183bac944b468ab9fea2af749c80af6ce845ab79ff3783736c2. 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/TCAJE2589776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198c24b6805d22fc88416300dddd01b74957601581dcac50c818917efa715a67. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAJE2580235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e31e2802b6672d423b6f1164782d679c8a9c83c35127b0aedcc1c61da7917. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJF2508799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7292d69cf5865ac29b047d69aace0864ea000a28ee009e71fa155bb870dcf27d. 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/TCAJF2508852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8545bc5bc3cbca22c21b4f08183ddf9761aa612b7344a4a6a50053b17df0b9a4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAJF2532590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a5db6b75abe7e0237a8878757e7df7f64745e15174ed2e674df66ca77652ca. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2545380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb00256ac62358f78e1a10bd1f7baba89f7fe776bb1ab2f00c73e6410bc3fe3c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAJF2552849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e5422a7949adbd232cba3716ba68117f4ab1638a497a712713354c042f628. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJF2554084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c18301db1909d1af96fd424695b2e2acf1f50584eb41c5399a0f1c36bbc13b. 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/TCAJL2580372.