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 0x6919cd787cea7549bb31033bad1cfaabdb86f80fc02b708e845c74e3dd7eedba. 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/a6df0e80-9f31-4c8d-9b2c-627f359aa904.json and https://artists.proofprofile.net/proofs/artist/a6df0e80-9f31-4c8d-9b2c-627f359aa904.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 0x6ba0b3db421d284f306cb2c68018a83f479b8873256a68aa2183c0e3497ee0cd. 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/GBKQU2347251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4518c8f2b48d83596e54d11c2c294f16c37a3e9bf57eb756110baf1b80be3095. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52339285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff43dc6fd4f8fa47af3b582a943dbb72d0190066f8063ce5be0da3e448ccb8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2350395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031379018773cc5f6a37276a81ef726b0f2d822a797197c9a9ee9c3c7b0296ce. 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/US83Z2350389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfe7e2dcbad2c7835e344566eaf205c6339775f595011b245ea9993be71eb19. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKQU2469123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9466bfde0cda1701a350b3ef798ad7f0b4d08c5e9a40984eb34bbb67b9de35ec. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBKQU2469124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0470c58166a45959eb68477d9763b77b6151f2313a7ff35ffdcd23487c349. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBKQU2469125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36051c9a8cea2fcca04947e576dbdc2f6bdc786a6819ff47191eeb6893c6e109. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBKQU2469126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad77a1f2332753229c3f866b90a9a7f565807173252615a981b8ce5729631f69. 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/GBKQU2469127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820e2bb7484e7b498b7826854da921a78535b3dae7bef15dc64a3fdb8d6dd7b1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBKQU2469128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cb14ccb064b6a541d0e249bdfdecdf922ccb63323f45b1e39ac718d62eba7c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2469129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a202345023bba1726ef59d80dbb469af6d45fe4cbc67ffc7cb7cb5f53fe04b0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2469130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36051c9a8cea2fcca04947e576dbdc2f6bdc786a6819ff47191eeb6893c6e109. 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/GBKQU2469126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ec45738d1f3807121837d43115c816d481ca30342e8ea6f46041470d39cbf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USNRS2242361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a915fb5b372e47b9e0caa28d30f4ed579614310edade3d3e11498a4786ac8dc. 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/US83Z2215467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935a2d4835f7222a5a42376e705bb703e98ea3ba8aebbfafc04747f5f138307. 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/GBKQU2233839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4376a406b5b0cdf676661e887888c43260e718715093c3951824cdd6c4572aa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBRKQ2158624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a95e2d99827fbd981f6230f687441c225c106655e1b9c9a20d59793098a6514. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBKQU2420469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826eb9f7d98de19435904bd5d602057772f3fe5b0a8bd7879046890138aeede2. 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/GBKQU2420470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea379d987004246aaaf47deade0fc32b635b411be31d8e1f1293adddbb2b3d2. 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/CA5KR0003554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c4ce4fa7f2bb929634121af9dcaee93d551c71f163cb51084d5a33eda7189. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEH742215989.
Witty Selection Series, Vol. 19: Brazil, Pt. 2