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 0x26986639da307f2a14c0b0859febfe51c08dc3cfcf37eac3797a841a16d2934f. 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/e85a79d0-5121-4af3-a533-dc132b988e07.json and https://artists.proofprofile.net/proofs/artist/e85a79d0-5121-4af3-a533-dc132b988e07.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 0x186b0d6b6f587d7faef43b064da6e0928af8e7d41e43590803aae2df379173be. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2403549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84c7ff5ca46a082924079f4756a0d564163dfea527bc635db4e94bccc4e12d5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:05:33Z), 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/QZTVM2403517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66a37d1d9f9838db6fc73f827a4a7ea263a71379a027fd6f346ad4842a17a1. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2408678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7435e46e777a1b097e8e9e826aca408bb61836399d2b3b4e15b3dd43c3f65e9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2403548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95ec154e88e3d7dd91a34f3988846667c9cba2d658fa4b5ee84eea728d084f7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTVM2403551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826c149a7e49b4d4f34a964fa3b0308efbf652b2116f0919cf8ae8d17e33abee. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTVM2403520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb00c8d3882eda5c088ae1e9062fff7120a20323d5ab839f3162192005189d3. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2403838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cfd751a86d42282cd86154d8242efae4e3825fe84b38e7160cb4450836ae8f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2403547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ed53b9c882d0ebb8b25191a970d9d521c30e7fa26b03bbf9ce0d4aa0ee212. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTVM2410623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0948a29b27810bbce342173e4b187cdfb775ac5aae5dc74453220004e4a8b70. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2410637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ccbdda7e70492abca9cf1f9079f652b821a9d59004bd3e234a02b2f9af0bd. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTVM2410645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbd7a941fa3a872d3b7a97b8ee285e2c0286794982f032d457c840a4f03bd9c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2435091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce7fc465dc3f0d6c2ea54e43f8705e99f3f7a79e99f1b30d2226507bff07ae9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2435323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257fc1c99f9396aa1f7ce2281a5a98ad77beeec8533ee36b0612b75ffebd0f6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2435278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf127f0b9a8dc9af069daf58786be179dbf886b03de1f98d83a76f5c1c959c122. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2435282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e22cefad8990548a0be5558f49a86e9e4612a3fc8583b93951ff54ed07c960. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2435317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af47e4d31dacbd5b9fba73dd3288dd60fdf716e7a79149b566fadf10b0f806. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTVM2435262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a46ac7db31fe27ddb0e75f6364f39762ef741b426204124d4f3fc8fdc0ea87e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTVM2435280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9affe5e9657d420833fc3b095ea905524dd59f7b51234018c123042ae94d15d0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTVM2435284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82507ffa90710785983a6a41f0c144deaf8e2953e8b7c5f0f1046a6d2053e7bf. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTVM2435314.