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 0x2c055f88d11790190b1009398ed3800c501ccb612798624c1bb06de63e6af95f. 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/cd5ea125-3e79-4ee8-aa26-f01761a722f9.json and https://artists.proofprofile.net/proofs/artist/cd5ea125-3e79-4ee8-aa26-f01761a722f9.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 0x2b30e52feea41415e92396ec1bd0c32784b2e8ac3837ed129bbffdbd674ad785. 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/ES71G2237954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598605a3bd078b9bdd965097b1f588ddf692611ee6888e9401d5deb2870e1954. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2327999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234265f6e7460cf094467de76a0419b9f48ea629ac2f3292fbe28f9bf58dd709. 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/QZFZ22307745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87213a451d01e63fae51350eeb26c6d76914e03187f2306b1a0c31878a1bac. 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/QZNWV2390339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1475741014c98f4f133c60385b94aab004003d09db21e16414cf7866567df2ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLD91745788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3fc98aa34b54867c9679b60ac2031a13ca7556dd258322ef71897dd7ae31be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91745789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff91a0eedab9670798153e441a85a6091288f99af6a6def7e599e96e7990932. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb06634e371a003a845f676005f98c91bd3b184f2c7c8bd16818289d43fc100. 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/USWL12201541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c39fa602498562aac56de84df34ee79182f70a55148d4b29156e70c61409b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42221786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38fdd214766e9b711de09ea833bdd949cd3cae49df3802f6d8b46827fa2647f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2215529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e834564be330f40b7d3d31bbb6dabca10d159c9f5c460739c1f15e8c09be2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLD91737433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f60671a65a085a3282d1670da9e98f9b57ed85496dfc6d3972ccf9a211f5032. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5052200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30336cd19bde38affee90c13becf651f81f1485004bc87ba97128988783d8171. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2316750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108b9be21d5699e4930b192634a1faed218f704a63492981b7b450fb656b132. 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/ES71G2316754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df5bd8a3804cf30daf0b227eb2536fb381ab19cba180c66636503f7471c07aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2316757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beef3517877355661ce9c76a7b3be5a66604406f9efd349393d71b59175f257. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2316753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18498b8c1d20ca85f4b2d7ec8914b4056603c7b9189f0521f51ba506bb448ad7. 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/ES71G2316751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321ba9d1272f7c84214ab31e9b96c22052c69274b37d21c7cccc111e1fc64454. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2316756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843628b30515bd22005d570ba933749c40548ef2299066246df344c5cc63a079. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2316752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f17106ec2e8208f0031644272faa991d4e732e3879c8d0fa8bea4f56a2a5310. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2316755.