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 0x76771715b395f49221ddab333186dc7e15babcc336a093c581e06fd70d345d47. 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/032896c3-da84-4707-9f8e-0703638f7ed0.json and https://artists.proofprofile.net/proofs/artist/032896c3-da84-4707-9f8e-0703638f7ed0.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 0x3bad673085c4ad0297f92bf3f4fbc73860c4e525febf006fde756d0659287540. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CZA231202347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8840caca22d43c596ca2371cccea214ac9198798832cda5123f19001e968b5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:56Z), 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/CZA239700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b1af28efb9e607077f7900a4d01ed484f54ee7058d4208e30d2a795bfe1ea. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZA239700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c9cbf6e6365c45d49f04ed2e4fc811f89b93d7802817a1c433ddc9e21ed8b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA230800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4dd348a48cca92f9c98debb3537e51df34e1f3695e5bc0e8b3e7cc2cac9adc. 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/CZA239700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b1af28efb9e607077f7900a4d01ed484f54ee7058d4208e30d2a795bfe1ea. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CZA239700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7e3e64407336319265aa120730db5278ce3ed00be989f10ce5ce21470450b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA239700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f9cab48381c5d8abf6fc16a0e6365293bda97c732ae003a76a2f53ac76857c. 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/CZA239700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0d39c89f7726a7a24fc94543d614342b3ff0ec2c9895c179fab4bff7275473. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:13Z), 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/CZA239700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0692e3947d175323954e90d179327474d3df3e3dcd04f4bfc931324aaf336ce. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CZA239700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471c468c6921a55f357ad38ff6f5c06f16612a0af6d9b5be117135af37968d8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:24Z), 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/CZA239700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8840caca22d43c596ca2371cccea214ac9198798832cda5123f19001e968b5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZA239700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b9bba60aa1a8879233c5bd404ca9faf4e08a118bcc7c3e1349d2fc1f99fbab. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/CZA239700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab49acc1900ab37a7e488d4a68e3ab0520cac251f44d6764647e9ff18b8b830. 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/CZA230500616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ddc323265c24a42fcd0229f601ea8da416a2d16f57566b572843eb7c308e3a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZA231202286.