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 0xb0121e121db316b6ce797b8a1bc367857c428fe372a99065385a41dd2e3f0b88. 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/14f9396c-7c61-4c1f-9045-4dd0938cd33a.json and https://artists.proofprofile.net/proofs/artist/14f9396c-7c61-4c1f-9045-4dd0938cd33a.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 0xf95d5eac7a9c6a631136ec788b7c3bea3e3cd56aea77b7fc82c961d35ada871e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNMY2395432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a70119dcb8fa4aed32fc5bfcd2e384c2ec13b38c5f3c17c9be197c4a053144. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNN22392817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5985188addca0f04bc87f18a121a59b168542f7b46eae41450063a22cad9d508. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:46Z), 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/QZES92433203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377fb634ff684a056598fd4afd02b8d5f827771ce9af7884235cc7173c07d6c3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLD91760633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c483fbd409ab1c170cd40ad079eada1bbb9332e28ff245e4da550073d9c499. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLD91766087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e55e1fae9db0dc1a702ca3daa7bb7d2fac8f06355daf2811f839d4bda448b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USLD91766088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06de0808d580dd5dffc9800f31339787d3d19e1338a0abe9f28c4ef56ae894. 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/USLD91764454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39b6db5c3afc4887fefa75c1b4b6904cba9c700f564c1fb447197320466ade8. 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/USLD91766094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd2b7c16371ea7013ef7b0834478d06ddebb107cbc57ba7c4b46f235ade072. 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/USLD91764448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4072a9f10242475ab70ce00144a54f20d267fe5afee3ac9c17482c4856f1d0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLD91769187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3745ec6b822a6fb2efe68749c1c775c81ba05a75685e8714a4ce9c1e5fe12b7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USLD91769841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b8500275ce9b1d25d5013050f147469bfdd89464c122fc079713121543752c. 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/USLD91772303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26182381378c2307b6a756bb6e21ee0f504e322b5a6aef41cc93a6d0ed601e7b. 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/USLD91772304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4de9eaa0c6528047910e763e661dc279abf50c06be26c3ca8006afa7c46719. 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/USLD91772306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231f13c7589b377369d84e0b62118406047d395b7a6e311e29d9c3bb74e25cb2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:54Z), 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/USLD91772307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3d6d6d309cbd6db3ff8a273408c1935a64d04e6789392199411a5b676f8bd7. 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/USLD91772309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45edc15fbec543c529ae67837d728274b16b7dfb8d87253f1ce0e8e11a67a5d1. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USLD91772310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c52d7ff1329b4952cbd50acec87bd351810f908589f09ef6da8d5aaf2007e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91772313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7fce8a94db7221124bb6500a2e99d2dc121cd4c2621621f9295dc5df0a4a27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:27:02Z), 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/USLD91775955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5977cbb8fcbf157e45b3261d0112622cff0c5c9bcdd7cd7348537f548f6b1f50. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:24:42Z), 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/USLD91775945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120dc052d91aa6b0e1e0194bfa8485d01235ba56bd6d436fde5e0b6256c30d61. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USLD91775946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303150e6f502c573ae301a0d8ade9d334939daf2e1f4601f3e73e1e880687174. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USLD91775947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2da7561fe12a4030980b555587db76f335c3dc8c89b5fa8ec91778f0db677a8. 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/USLD91775948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62e8bb83e91c7ce1526f12027dcce14f8a6ff36d870c2e8e96cc920d4984c73. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:16Z), 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/USLD91775950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b532085e982fa2e1469681b78699ed754289bfaabed622f2a40f3bfb4bec28. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLD91782581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca0c05e97cdd3492657b769b3ead9af5d789d5a968c32d302b07c91cce794f4. 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/USLD91782651.