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 0x8726029cc07bd8ffbba28cb144575551c9fe19c1f69627e519fbd5f641bd9613. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1321850f-fdc5-43e2-a8a5-c96796de5224.json and https://artists.proofprofile.net/proofs/artist/1321850f-fdc5-43e2-a8a5-c96796de5224.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 0x1e97352d90f77764aa1d5a9a790ba5e404f7e99c73d03afc2628da2ef132888b. 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/GXF9Q2438637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5be3302658f721cb9baf9e2f296c2167fa79d991da7da8fa4c51e25c0df806e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:27:56Z), 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/GXF9Q2438638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca410605fc1ce7ce1038848171148cbda37834563624892aed1d500d4b5b99. 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/GXF9Q2438639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b394682bd30a5ebb950321493eeb49ff8fef1ace892852b1fc10fae462f4ebe. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GXF9Q2438640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8d434900cb5d7d2845907ff2ca629cc2c27a8534144de9a76e17ac739e8b29. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GXF9Q2438642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180b5ce05f1b9651475cef6ce0f30157c566d00c8b14c126d95c415b37435391. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:19Z), 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/GXF9Q2438643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d76de250d500d21162129a4143b53dddb14b015e1bda44cfabd8e90f6ccac. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GXF9Q2438644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2e2ab100b924a3cf2b2bbb683d2cf202a583b19d4b70d3e29865e993bd7382. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:26Z), 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/GXF9Q2438645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f690a7d34b36dacbd2cb6e13c3391a2dc8dfa72e2599be9adac2fcb640670. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXF9Q2438647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc5564a1de25fac3b240bf85e6c2ccb41dae76c8dc8da954d0266fbb7b3d7f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:42Z), 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/GXF9Q2438648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a49fa090b29ae08ed71353938fd0156a34856bd3d4bec8d99708d979f9ae15. 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/GXF9Q2438649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7567f08164e827c176a3001c968c4118491c288c43172c446eaa665458dbeb0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXF9Q2438650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089e1f6a2f676ebf3d6a1242e412557fa3ea10930b8e9153e8338b03c853d51e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXF9Q2438651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ba56dfff5d06d343f66e0953a5b43d2c700506b7aa65dfcf93cac431aa728e. 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/GXF9Q2438652.