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 0x1228762acdd4a4152a0dc8c7c8c5b5b37ad113577dcb9aefa9a621283c07558c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dca2be31-ee41-4480-80a4-232691e91da6.json and https://artists.proofprofile.net/proofs/artist/dca2be31-ee41-4480-80a4-232691e91da6.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 0x0bed23a3c22a4d3553b7ee87dc415613edc7a9c921438201732a6bf5ea3e4a74. 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/QZB4J1839291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8115282da5518ccab381044773f8918e6df00cf12762b8725979d8a0af2d56f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACE1509716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13066a23f98cb7071e86517630920f697b096d09f5c0ed5ef3b5c0169a32c7. 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/TCACE1509721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738db9bc1d93fadf0e12671b3c8e02fd5832f5adfa5dfb544615e3cdbcbe764. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCACE1509723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1892a0bf1a8092c511999ae8b36b2760ebea62544afdd17ce2be757e1d403e0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3X59701301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21249e76ec20b677f226453622b25e774c67b98b84a5f58b5556a72d67b2b243. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/US3X59701302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a4a2f0a64cb79d8c4c904a9d0cbe3870392eb41040c55ff2a1865008ebdd2. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:35Z), 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/US3X59701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9337c98e4698534e67ac3960a5bebd38413d460af0b007414706c2d2b4c51155. 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/US3X59701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548958db6bf36afffad733c7a9a634979beb2a1549bbd5010fe8eaa5a2f5f1d. 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/US3X59701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55576d7c4c1198d559a48fe104842a2b421aabd6c35471a0b348752a0de2d4d. 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/US3X59701306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76217e433b2da307a8629998eb35ab811ea0170cf114b63a06763b7a751737. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3X59701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8313e819176dfd578686f34297ddab7c0557734d601b55a5eb1c1e4649369de. 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/US3X59701311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97f4337e3b0fcc3bf5e92ccc4b26d46b075c5a60e7c77ba0c394a7755867295. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:18Z), 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/QZDA81804260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad76cc0fd0ae7da7d53a1ed7e09744fd1d61295b0139f96335db13ef077ea63c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:13Z), 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/QZDA81804261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f26c4ee4963103cd1fdfdc35b222bef06d8d92122cd649218a0b8cdc1e8d494. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:18:59Z), 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/QZDA81804264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32582673adca55f1fade39d33fd7ec22d57d3382a1f114de473b8b9ca724c21a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:20Z), 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/QZDA81804265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1783c54193f5633deaf6e6994916f5e217a59d111d864f3c4505c74dadca3ce. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:12Z), 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/QZDA81804266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026aaf18ed2ffbc8867c96be6a4d96d2705279520430a9017af6e62839f0df37. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZDA81804268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb08042f0a0441fc347bf365351baed75d5849fc20f7ab2764d6cb87b110d6b3. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ72074237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439bc695e22bd1f82fc48ab8a87833e6d57b256a7905c501d78a3ca82124f58d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZMEN2090876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b140144ab7bb30ddfa7defc6b3a41a8b8d4577dabfa0a7c0fa863dc269117ea. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:43:38Z), 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/QZMER2008810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603ea62f094dec85a30d5f909ea1ad6dea177945177907afbd6a729425692cfa. 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/QZMER2008811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361d8c19f664cfca8da131b5f1d8d7a500a864028bdd85a8ddfca9d51f01acb1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA62150759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e98c1c540d3d928573e895c1a0e881e72ea52a9b470c68c0a013ee8b0f4a0b. 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/DEBZ72500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b9bf652b9d581171e331f4dc7726f31a7d14125b447d5bb49ffb5f53e5d431. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEBZ72400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b591ee2de14116476bbb42ef4ee6c10233366387e0f019a6fefda32d93d968. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:33:08Z), 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/DEBZ72500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1949dfe629cd3147935bc800c41e060b9c3f45a692f57639436989d9a2e9c41. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TX2332185.