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 0x71889600acd520dbacf055c04d04d52ff1cc9e9e76b6b1f05b30b9bd10dc4346. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9df294b5-0ae5-4ee2-9b07-73b9906ab594.json and https://artists.proofprofile.net/proofs/artist/9df294b5-0ae5-4ee2-9b07-73b9906ab594.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 0x1eb8e1548ef7497cc87086f38fc42145c5e766a134f4a75ab2de76868008cc1a. 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/USLZJ2584911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482d9632ff2516d6390e329e6e15c823728654d3b8bff8341e359e9766254f6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXTRN2400673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa49f2be031d49025d031965c66bc114a72b07d6794b4ad7afc84d7aff4d46ab. 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/BC8182500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda63b6304f9e15ae83debdca47a4fde31e3c1181ef7d5ca2fce4466a4437ae. 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/BXTRN2500713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa773ebd73ae6dc06e764f1ec2dd330f308f0a9f0c1e36a35a459f7cb1376629a. 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/BC8182500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52252b195a3373dfaa074041650101cbca46aad5664a9a440aa126d86287ae5. 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/BXTRN2400659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28523a2387be804fc6d70a72454a506cb93a570726da9b06a3dd6d7bfe4dc379. 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/BXTRN2400672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f900fef8fa8738d771b9556989788984fe0e93857d01250cd408c3739a2b2a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GXD7V2569990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc167811263c89e3974c01d7909e587135d0d17b9b21009d047b57d221c55bd. 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/GBWUL2558728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd21f52b72ccdc13ddf93b96e63e8a22fe8c7a69e15e060241494c67dbf9d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXTRN2400660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4513a967f322261e9426cb34275b3627ef6889d28125e06bd4af67992bc7f. 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/QZW9L2453005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299e4fe6364367b0aab486b78fba39e9e54b3ac1061a1306239e81a9a71a2f9d. 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/QZNJV2552447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261d67df3e5ec7535d3da811049ac70fa40d1c21a49d39a05e6258d55d256c38. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZ5AB2206488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ba8f961903fd7b03a67f71dd94169d748c0796528bdb26e32f27ad2e0cf060. 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/QZTVM2417762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab377ff3a0845acf1ba66213ae3dda5fd01314a6485ddb2884a01bb79fbbc4be. 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/QZTVM2417768.