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 0x94b89e3116067eeba88f36aa2fd47cbde99a50e5b059d0aa8f4a209772b2ab5c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4243031b-44c5-4b35-9dde-57932e00188f.json and https://artists.proofprofile.net/proofs/artist/4243031b-44c5-4b35-9dde-57932e00188f.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 0x0ee8ca68081102bde65fc193ed10693a581c08ba6ceb1528694b28ca733d2aff. 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/GBSMU4413491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f4a8548824e69139906919552ebd7d8af89253ac0db13e36c107404553d01. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU4379895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9e984e9ee6ca48de6156dfb2bdebdcac60d83876bea881e1390d7c75a55f2e. 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/GBSMU4379897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b83615b6ed3a59566c8e3af1477b27d6c00ea03192e99698d1fa7f9e8e6a97. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:35Z), 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/GBSMU4379899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbfc798e9d34c248290bfadc38cba72578fda785751c5a15f739eaea3d925d5. 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/GBSMU4379900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83db12f6a5ab888ef40c27841a842013048d60cf13b4f37e158872b24fc41b2. 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/GBSMU4379901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cc2b4646352aa3956242806fa48a5fcd1dfa68753b2e6c2f361ad788de9ce2. 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/GBSMU4379902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe061e5c78a11f305d732c24e1e0f0d8958317afa66d02b0d16b22a7084c3dc1e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU4380035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9579e1c9bb37ba930dd0c624e2d229588a772ce8cb69534f660ba9807d1268e4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:59:28Z), 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/GBSMU4380039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c932edb374cc2c873b7247675b4773c97cd1b39837e4af53cf1881fc30f6f. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBSMU4380041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fb57c5f4fa90765bc9d5dd37c0b604beaeb31c1cabe41a59e865647aa4b3cd. 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/GBSMU4380073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67360866c3bbf9354f10684af7137008ec514ed464c254bd5c6581d7a4d144a3. 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/GBSMU4380074.
A Burr for All Seasons (and Other Tunes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9231609f3d7657104fd67e6f1e6159727edf45be93b7ba79da49a9ad5087bb0c. 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/GBSMU4380134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b20371c7e74fdf956323100c972874c5cf0cfd3f3ebf76d4d5522911f1f4f2c. 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/GBSMU4380135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5479f82838ea844384f1c58726abb5e889afc089483105a181d819bc6a83c2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:16Z), 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/GBSMU4380140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c58b3d7fc839e287ef99cb58db94b6a8d973f0b95a1aeb775bfaca398a437b. 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/GBSMU4380141.