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 0xbf507f0be860f1b77eab10b939bb6c5af4d128b7d045fa7066611b33dadd7d32. 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/a06a499c-e863-4f61-ab6c-75db276cd100.json and https://artists.proofprofile.net/proofs/artist/a06a499c-e863-4f61-ab6c-75db276cd100.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 0xb49bfa7116cc7c99868268294e0ad35ed391681a625fd16be2491802388dd3ca. 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/TCAIV2468419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17ad9e35f6a68b24186b7eca499d9c4152c3706cb948806aa420ccc755b61b7. 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/TCAII2472864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cda51dc18a03d2e56d51507014a271d00f64b38db8c98a26c5ebae5e55ee67. 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/TCAIF2482171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd613d565c0e1e962e7500c70696f49321f05fcf7543b4789bfb936111742aad. 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/TCAIF2482268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c126148377366a33349671625c945d7f41cd8f702b30058a178a7ff4f6784f. 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/TCAIH2468804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa125261956ac61dbd95c79e631857a337e702ed1b69e820979301f4ffd19f4a8. 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/TCAIA2411972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd172f3bd4b6c092ec195b76929c2d1733c264e2dfa08255e42d694bf1ac39ccf. 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/TCAHW2453232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a5c251764ca212c13a9ab1658e978a0cabe265e4a8c843146c0416dd553091. 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/TCAHS2348538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343dd106b1fce35285f486e6600ac4be3cee363c6b246e6669c3bf2c64c33a8f. 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/TCAHR2329762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc0ac90e318e38f7d7ee302d8201ddd94a89fc9fb08e3209be2b1ef142ee704. 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/TCAHP2396691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0dc582c7056c7c9234bb5b16b6955c28b10edf6e20ceef7066d6b39a624801. 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/TCAHN2341123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48279b8d5c7a557a927eb626d14691279ec0f987dd45f39d6193b9e0f6735642. 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/TCAHH2311317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fc9a96692858d4a28777d8e4064551c1e5388618988aaf28a5ede54cc7119f. 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/TCAHG2385473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792acbb6fb95e30d2b3a2056f5d23579ad6487099f6064bf82c1aaaeb35cf9d7. 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/TCAHF2392887.