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 0x86886ef7ac7567b158aea658f9e23442cffd9dcd879a079ee29a492250c7b646. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ee91a6f-c9c8-485e-ac35-5e5a7697f274.json and https://artists.proofprofile.net/proofs/artist/5ee91a6f-c9c8-485e-ac35-5e5a7697f274.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 0x4aa32105c454b8fef8d4e3a9e9a5bdc346f6fea5981ce7f3f851ae5e9a7b4655. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXFJ92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6c6c7f0bebf34399e7a3e81a1d63cd23531b6cddc74bd1a53dae430de5b20b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BXFJ92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0df70c6658bf4ca1a155aa54e7f63850fdbcf0998997403ebceba475fd84ca7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BXFJ92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd3349d536bf5651489a73b2275385f496ce7aab39ac231437063b76caac48. 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/BXFJ92500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11af420bcc950913bfe77e7c641fbb44c5647d5d4827bdb8565ace374e672e2. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:59:15Z), 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/BXFJ92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7baa4a8744eb8b9413ab7f2bd36143e3923ac890fee24b81bbe792233cdb70. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:20Z), 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/QZNJV2415315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36741b0cf9b866d0293fcca83fa517f98ca35ec534cd01224ab56586c648eb35. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BXFJ92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ed5a5a0fef1196730f76ec92cd3354a7c4ae35f9b230750618219310ac3475. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BXFJ92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50597ac4c3350ffb31196a2c24d94df25f385a18d5d9d46d41d22734b18c9387. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXFJ92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260ce5db4fd3607ea3f62fe4a2149da09470c071f5ed8d55b21db21cb4455fd1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:46:12Z), 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/QZW9K2462384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328bfaccc6aba87adb480c6306f85dbad4c11f912459641b580d6bb6ac5507c. 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/QZW9K2462386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26607e4ff14f979ecf452e460e0872c36088c78cb4f0e3f07b850a92ceccb31. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:37:33Z), 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/QZNJW2578310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710b4be4ffd2784132c883c6fa50d93aad440e3d04b43b9f69fa7a28286a528c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:19:22Z), 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/QZNJW2578315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2eca093f0828563a219cc4449c1e243ab65796d7b1b6ac616d07a9b87a6a65. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BJFJ92500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e47d76004f67e0fc1877fa28436b392849283a6c21da20893b01cdf9ac306c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXIED2100108.