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 0xc1fa3fef989bc63a49aa06635d849c11f533f4772a271d74c6830443b98a3533. 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/b371e2de-8538-4e6c-a3ab-70e6674e207f.json and https://artists.proofprofile.net/proofs/artist/b371e2de-8538-4e6c-a3ab-70e6674e207f.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 0xfa4c94f8f9857694c3aa0345551d70d783d60ccbf71e0c42ae6bdaffc3d824a9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/IDAA20800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14cd591a128a6a0697884bd8ce13f9fd047481a2617dc36d4019350546d72e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IDAA20800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf77cfc1fdea2c2c62a8b4e336aab5b0b3a7937117e1b1e26901821fe0c8018. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDAA20800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a8de51fa0a6ea4221402254bc7906234408aec2049240cf241ccdf70a6a42. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/IDAA20800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8533020d4282b02d4b1cf7203bb1684587e54b0b6aa9f0e40b946f901a383182. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDAA21000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb66d9cb155366df8e73b017781eb765b043ce25655076358600fd3d3705deb0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/IDAA21300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee09ce1f86dfd22cf8f9c2fe1d5f479dc3eb57fb7220f6826190cfe92e6c730. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/IDAA21300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f14f35b9db587bc8903dd1ae44c152eca1900832d0a0102ca2c4283e85d1b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IDAA21300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958604819f1274b721fc1ba54faa882975d4f46723f3e2409c1388627164e2e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IDA391400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887d827cd71852c9f8212dbaef2857d3c193cc072878d2866a29f58c1dc7682e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA391600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f4636fe926e96ce03ba5445cbffe9f3c54cdb2c7602203e7cd5bfd469339eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA191903416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c851b1b9b5ec14f360e5c55db1516c27fc03c8c0b6d1dae491e103fd14fa314. 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/IDA191903417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab0abfab3a44bb304d550ecec98369e732a62ca740676a6caeff7ebad50a102. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/IDA191903418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0ee2d0fb9c85e2d80843f8e5105ba0e19ac024e5f2f919e7f8ac516d289cd. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/IDA391800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd382021c9a952d3875863b9ddded99a2855f654dd8a556ffaafa95f47144d62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDA192303854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef11e3e3a6153b60917aaa94d9f026ff6f5b968dff58cc409268fb7b4cde71. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/IDA192403885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef11e3e3a6153b60917aaa94d9f026ff6f5b968dff58cc409268fb7b4cde71. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/IDA192403885.