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 0x007cf274fb06509b673b5c4c7328c235fdf56ae6e6bd7a74d5b2d8ae7c084412. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f44358f8-04ef-4ed2-947c-a0ec198a9912.json and https://artists.proofprofile.net/proofs/artist/f44358f8-04ef-4ed2-947c-a0ec198a9912.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 0x0f15c2244caaab98fcceee79b09296f61ded4d64e2d11b5dc6a8b0e0128b8950. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:47:53Z), 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/QZNJZ2464569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbd69f76970be63570372c1337d2f382abaed6cc05821d6ccd7992af6f898d2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:07Z), 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/QZTPX2459752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3671012fb7c6b89b2d69950cdef6d0de8233d006345a347ece9d8316fba1c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:34:52Z), 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/QZW9K2477036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98560c7b7297ad36accbdcf33973c1e66fc5d43abb7009404b60086413745ca0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:54Z), 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/QZW9L2478367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57654f9c0e38a4c45a6ea7a2cc70eeb3179466d78a77d4dfc39007ba80e40d84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9L2478366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f249216f7418220df20e2796fa83c075daefaecd0bed5b46d8566cad9834855. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US7VG2515303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd0bc499114d503dd9d49ed603402b63bcd71cae48fc06308ca624b62b5ef4b. 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/US7VG2524846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b7d17c90fed2e5aaa48bbc83a98475a50c576609bd932ce8d073a7c3b7d99. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZGLM2526682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c9cef639c019350e1b9a26af495136ff6fe6bd654a93b38c9f778f838e8fa. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:42Z), 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/QZGLM2538365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7820f6860958f3dc34c6caf464da1b44728ef7842be93dddae24cd4b9231016e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMZ92564924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb9a123cc57a0a24babae564f262ca35474ae05be004c78667aeee8bc31959. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:42:57Z), 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/QZMZ92564912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb743776300a06f7cb50b3ab70f984930a4ed9cf4ac4dc397a1ef1f6c00649532. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMZ92585547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa77403da16964b016383e8810cd1e89e245c88b2d6dff0880bebb1db6891c8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJZ2540952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd94166da3c6ce14b8c252ed93d91e52aade60fe8b569de68f25c5c9e769e3d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:33:35Z), 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/QZNJZ2541024.