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 0xe9af9a6cfc1f52b0a2f6fe20cbd1f3a911de0a517f966338294dbb88db22c1f6. 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/ae17a2c4-58b5-40df-8f38-c82d53162036.json and https://artists.proofprofile.net/proofs/artist/ae17a2c4-58b5-40df-8f38-c82d53162036.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 0xd5c8c064c50637bb20a297e99d7a72c6fb7d61b1ef928a4c1a741ac883eb458c. 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/ATU331706801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201c0e5127d80da0244dc75259b3427c97565afcce9c0796ff7dd538e4667a80. 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/ATU331706802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691118f3be818673f5dfb1497fac76622b2b9d520b5de14350f9823c01de088. 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/ATU331706803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a62dee4e328ff1445d78f50d29fd132ec88fbb3d2f782467737b4aec141a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATU331706804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce627ff12a0719d24f77589623c10c55c183291d4ac8c3d19d0dee5d3be7ea5. 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/ATU331706805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9bc83849ae85e658747f6d812e6a258580d13f21b9529208a869ce85a34f3. 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/ATU331706806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54444d203bea1523debac9666ad103fc00d95a1ea290250417977873cc76c677. 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/ATU331706807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523cba9970f095199c8e3baf3f2cecf6d851475b4a85b348029039635f9bb67. 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/ATU331706808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbf7fb252c6a84775926c478270bb3f544d95adba6d3c5137bc81e71fd8c373. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ATU331706809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35390267106fa7940edd5db418054d8278f01ed55933f86e1f7a7fdb7dcd1c6. 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/ATU331706810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9f2e13948cc644cd8fabf9eba071c48c86add11cd55e79295b123221504c6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ATU331706811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e9f3a3dc1b2a088dcb9b4bbf2306ccdd4ca9a90c386c1aef7e02c4a74f3c86. 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/ATU331706812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f53afac6ce24f7675563500bf514aafe28a18b4062e1922f8a0968e471b6d4. 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/ATU331706813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafabb2c12e1b6f04e5923251276d759221a787cd2ab0be23a46365f50cba0aec. 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/ATU331706814.