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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b27ec8e712c5d3583639e4b057b74af539353071725ba9283612c7c30524660. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/236c1efd-4051-4a83-9b10-22e55f71163d.json and https://artists.proofprofile.net/proofs/artist/236c1efd-4051-4a83-9b10-22e55f71163d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a1f008c426e8d28de72bed43d9b10b83b50b5883693b5b7d57e7f7abaccb83. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/US83Z2211032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d42319b37137dbe65ccb621d90e150991d98591b4f40d47a5e480bce46c2a49. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2028760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1738ff7f6fb82f1fd5aba988d3ef3d0b273bf4c4e2b08880c9bd7a431e5fc2. 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/US83Z2001873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99e085185f86713753da85c279976a2f33f2445fbd4e44e83822de5384a74c. 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/US83Z2001877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571d2ea74f939b84e21a2755b3ab31a1331949784c424199d99cdf6e198fe0c6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2001869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417deafffea20ed06a80fde6f0089e084518151f32a403de44d570029adfacf. 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/US83Z2001870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd011a68d8efe7a37b9bbbbb329fd7d77c6126c4344a5d437f1b95080151b6c79. 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/US83Z2001875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd02aa1d3fa9412fa08c60572ca7381a9cafd43f06b2f28ed4593fbb681984f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/US83Z2001874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010653727761c08f4f7f18b290a4a40ac4d8623c98bb40f4acf30ed4817625d0. 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/US83Z2109144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0cf96444f55029c97156a7daf6659fff859e4a3564b7788450ec58190d5fe5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US83Z2109142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5d1490bcc2ee260bb77f297f11ef6d03b29b62dab472165dfdb3a633bd172. 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/US83Z2109146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aee1344752be7e973bd8797a4400f3db0d409bc581ac7677a28373326e2fc0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2005863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1c5f8f4d44210130ee389e1cfa988f0c674d7f06d01f7353dd4a4c35ce2b1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2005868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb48ecb2cbb8276dcbe27e45f71aec877219a3d7daace67d23393854e5281c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US83Z2005864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd8ed70dd79a25f961c6ea7a818cddd8a49f154ab0098f6b243be76568ecdf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US83Z2005866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16abc1cf4bc7eee23e43ac35df540109f26a8d13ee5b5d4c7561a99b8a47fb53. 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/US83Z2236444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c962cb95e78a83568130f0462a97bd060cd22beef581a94f8564b107dc89073. 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/UKR6V2081077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c2ab7c2a07596c0791c8b055a996dbd690ed050a37268975e49612cf4cc823. 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/UKR6V2182238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114710d1c6d27010802b5bc00bbeeb981622b08f82330bf53ae35bcb17d10bd7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UKR6V2183652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac62317e73b52fff666124466f08756ab9108b981f6543d079934ee3eb51a90b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US83Z2108248.