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 0x3d7f73ae16c729f7620431c42a4f32bd1dec82b0ec5a327f2c5754d4550ec333. 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/020c311a-b24f-4548-9c5c-ad20be0a18f6.json and https://artists.proofprofile.net/proofs/artist/020c311a-b24f-4548-9c5c-ad20be0a18f6.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 0xd8ab643a2ee3bb032def688b63487de817b05fdaec0ed0732e22faf66f6b5ba2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTRX2121620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910f12bbe2478518f953b50c17a44862e9c81277d824b8cb27223a7f6457056. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USLZJ2253916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2298c5799908cdfc3828d10ecc127f6a6378d9442eea6eb4d38c590c3495af2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBRKQ2216952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3c3a47c50dbada5d4922a6329200bcf1f5218d99580c3e36a419988a4895b. 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/GBRKQ2216966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb1692c0038507cf8322975d94bfa4392219fe74190c6a88d99fa476ef80a17. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2216974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43516583b7ef2599c0e75c5e4efeae474997f0690ced2e6163675d8999c5dd0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBRKQ2216984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7ff9ca13f7224f12c445d9f46d1729619be6f9d0fc3dfcd932516ebd9ffb9b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:03Z), 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/UABM12200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60148d7eb68cda0b977b5ed174459d04ee33023a6b332ac7c5ee9a1981e91ba5. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/UABM12200698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d50ef9f144dd0bd8576e8d28339cbd5a0ad65ca69c016a4039a364f9ffdf1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA052323412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48253ea514e5fe36f2c5a15b26f3cfe63194f12f720589274d1e4ddcf5491070. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNJX2393138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7dab7154ad391aec78d3180141d2309f44d347eb8d1edafce323641a81718d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR2X42409699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b717faf5dc8eb9537f12feeed90a1c48bd7c2c7af729345c7b4f2f4c215a13. 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/FRX282448632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620b111f6bea11e0d788ccd0d5a50929c8df7f7c3ece64fccdd2f9a21b0412f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX452437699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39abddbb899e526553eeb462e61bb474ea0ee298fbff0477aa708325bda0180a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX452437700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7855f9f8b34339ff21160ed805b555cf803d6812d4a66c7f0ddd0a2fb9c4414c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0Q2413411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b27554671aa3acdb4aa79b49e6642459bdfc55caacd5510ab7585fbea845b0f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA0H2497373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc6487a12f73af3b1c17b8a38960a123022e9408360e8894ca918dbf5b6fba1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UABM12200374.