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 0x1ac1295a99ef6d910dbbd62ff68dca56efe96c7fc8023edf3ec2b41a86cf61a5. 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/21ecc2b6-bce9-4454-b887-59c1c7b60c27.json and https://artists.proofprofile.net/proofs/artist/21ecc2b6-bce9-4454-b887-59c1c7b60c27.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 0x08eacaa196a9ba83f0ad8fd6e313662115a7c73f6e34b8dd756edf6084ba71fb. 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/GB8KE2312462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26536355aeef4aa29f1827bb72b4cdc4783ec84ed8cc09f349a6d4e0630d5661. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GB8KE2316122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4a1487390285696d0ed25832357e36b96d3649a3012efe07b1dc9ffc895f3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GB8KE2316807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f18be658ae0b6afa2dc24598bde0a9a10fa2109e26ec72e5f074afa531ff83. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GB8KE2403429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f88749d6a94509448581d97bccd4d3015955bc5e9b68081f7b74c7911d57a1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIF2415226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc1520e8bba959f6effd73548fc8caefdd878622a8c4ed11ef276b64ee1f185. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIO2414946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902dc0d1e71b71efc54a3c61c3b913ea1ed06f5bd202ba1c1ec2342ebbce40c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:11:54Z), 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/US83Z2420160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cb129bc3e3b2aa1d316b5a53899b51c4edde5afac4a3697c29a1435e2dd14e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2425290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc652d9443c1390df73d52ca177db549657f04435e36db0bcb70ed37639aa77a1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/US83Z2427588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6062424b921bd67a5506a39674121cabe5024b9a0abc3e85bfc0ad543c518a68. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US83Z2429977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc486c14cd06ee1b4816ecb9c5a785a8feaf48285239bf346fa83ac2127135df. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/US83Z2430321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d172bd23de10c42fa915d682ad09007148b56cd186b9679a266610d5946546. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US83Z2430322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09fea46081248c0d3700fd0594b5537ff8f8825b9de0a1b158b4a2c4f618cd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US83Z2526790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f720dbea35f11ffa2a7345657a96967efcedb00870ca161f16813d9a712cd50. 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/US83Z2548989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa001ed1ca19e3934a70262a606444a6584bd143e68135c67b8b8905a380dd7d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB8KE2521471.