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 0xf6ac56d0b2b8831da7e9483c9e9a8a497758a4c8620c4f74ab4880a5ab2a75a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7771b1f9-77a3-4769-b274-418fa006714f.json and https://artists.proofprofile.net/proofs/artist/7771b1f9-77a3-4769-b274-418fa006714f.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 0xe8a807894ed550ef3794d74e614813e662e858bfe527f7b6ea4e4b1d63f5264f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB22436804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9880692b12f08ad7f14ccabf3491d3599daefd1d59d8fb2cd12979cd90229028. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZTB32440204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b35bf737d42cc1cea970305e05562a78504a33562cbb87428ce5bbc2bc6fe. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTB32443566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0bbff9f522f16b43d1b09bfa280db88d5f94c104f96602aaa90d8d7378863. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:33Z), 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/QZTB32446478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20786f932876468af7158fb59566e96159d0fe6caa1e90d60b18b6ee268646. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:05Z), 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/QZTB32446471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c1db4d2404dcac28e0b22ac9fa19413f07b0d4508de7f531e7b62eae9282c. 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/QZTB32443587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d75ce8e5e25c84b7446d8b099143999b0eefd53b128c1330b40a00949049964. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTB52430267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2144a4fa4e20852ef25ad8fcf85f0669b63565288f011ec2bd3fa728b145af. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFR2490238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c4511623bf9e85f8a741156c826887c71d11a9e81cbaef8879f21aa3001580. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7W2453538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5538c2a19789976c9c2595cf588a69317dc858a061d407e41fdd10f57af1583. 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/QZZ7W2455614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a09b3a995376ba05b9f4ea7d24ff240475311ca855c11197f31a7a0113d918. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:17Z), 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/QZZ7W2472140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242e8212a9377aadcf8d8e2e02f67ae4154c8f733c7da3b810eda33451b5301. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52525536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4517b66f2777b45b681949cda060cf675136c6c36102fa9fb8e73d5b30e80e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHNA2511945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7120a068bef623a717c74cb8a297ee3d19822f5d791ab93deae97ac9f0272. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:40Z), 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/QZMEQ2570332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff19343e8ad934554a2502e4ea1861163cfa1841d6a64c98b6549af87397a46. 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/QZZ7P2502731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39729673414e9c81cc2b2c2d1ed8606f2b36af0730d0056ad7fac08f71171c51. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:55Z), 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/QZZ7P2505554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c914f6f749eecdda8f2711bdbb5b35b77c53aa69aa7666f24d8970ce15f3d5d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:07Z), 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/QZZ7P2505609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ef93541cbfb97b2a3d0091026e9003dc79b15a871c2c36951a79f00727e16. 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/QZZ7P2505644.