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 0x5b37830819d57e92981451d0e39bf6620ed8aa42c16f8f65804658c18aaf2b5b. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b50140aa-8e68-4cb0-923b-ea0c64e3b9b7.json and https://artists.proofprofile.net/proofs/artist/b50140aa-8e68-4cb0-923b-ea0c64e3b9b7.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 0xdefc1a38e8b19e734344def6390cc7bdc63aef48288973b248121db76877c650. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM82454200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01baf7462c81c960fc22ebe86022c699eb303a906f9d8d5a21bc10edd8722ef3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USHM82454201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e21177589050f92bdf7d7489c69fda482633fe7654d6bdfc5eae58be774924. 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/USHM82454202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c198ad3b8c1b6c473c5ed6223ef3ec6c8cdaa97bd0ef35bc3c172423f0cb69. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM82454203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc230e5ac991666e471fe25cdb5021b6c65365fd577d706dc998bee92c79dce8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM82454204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f04403bb83eeb0a6933177bc6d5e90146cf5add59998a076519ad409722f2b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM82454205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f452738534acd1da2b17fa81d62889c64a4ccd40a67d09f290433a1816eb88. 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/USHM82454206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148364f78327eff3ab3669613b122043d77670cecbc850ceae5c86165941b3e. 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/USHM82454207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196e7f07d66b1983ead9452cb3a558a168f8e11b36c1178ab4e9658a7ef3a40b. 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/USHM82454208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3765dc9962249b1ad99c36aa50d37d6db27b7fce96445186d61440f4cee4dde1. 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/USHM82454209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77bca6781b865faafb4680e6077d211fc9de94043f13d460ebe32d6aa8c4be6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM82454210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62823cd8b670c5e93095c70cfee8af3a2a56bfca7ff2552e24c72e1a17a69dd6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM82454211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c9eaf482d6bdbc352c967fd8fbac91a2155792e24349b6793ae052e58363db. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:25Z), 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/USHM82454212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc0e1fa6a1c3ff37db949767e50af584bc356a3c2917873ca0461c38f3f2788. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM82454213.