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 0xbf14ebbd4f601de21cf53073ca7caffd79fa20d8c0aa55e251d80a88fc9f3ba6. 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/50ab0556-678c-4bba-b018-45a5cd9d437e.json and https://artists.proofprofile.net/proofs/artist/50ab0556-678c-4bba-b018-45a5cd9d437e.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 0xce69b0892dfaa4b872a4e0aa9ac32bacdf3c5c946b1797a0bc5d8072f1346ec2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USTC90999076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0b96cfa8dd95cab6c342cdc79e2f969b1893632c06cfb603310f5918e4983. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USTC90999102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc94d402dce473dc182f9860433aeb3dce7c7e18cad23d3e534b97964194b563. 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/USTC90999121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28496c0e63c07b4262ac69f8737b1df9ffc0741a4999a7b494c1225b7728488. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:15:09Z), 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/USTC90999178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc03970ac1c4529d4a4854e3f10b114f343da9e66204ea408da62d6d0abc8c2. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USTC90999316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145502f25f0c868317e8cab78ae6aab05beb36a93379b9bcfd73e7710673464f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USTC90999350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2755cd516538695729fb54ccdc07dd4ea632ba10ee561736beacd77c64539bde. 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/USTC90999379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e69ad8036c8805c2cc6cc3f122b85310b292849ceacbfa4c48eb83a7d5a04f4. 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/TCABC1183081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb74b87391f0bf7d98d2c63c2d2217bdbcb118df44b607f104c106262b75ab0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/UK59J1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574e9d1f0fc338ddc3603edced874ae6b19015c58b19ddb5830bf356eb7647e2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:29Z), 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/UK59J1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4307916f344b46b3fe6f9314dcd02f3eb0fe43370ddc197491aa0ad8499202a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:44Z), 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/UK59J1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa780aebfd28617232dbecaa775e1cd9b3177cf3702eb3f4a477acbd9f91a26fb. 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/UK59J1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b0901261b76eddd86849af51f9c987a3747c4c49ab2f6e88d41e5a74c0b653. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAHK2301881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d9a815e181159d635045c8e478d040ab6a51f1f57059227f6a175b58345f7f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:33:54Z), 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/TCAHK2301906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe57b38cab9e882f28feed2d8d3abcc6c2b24bf5b9768dd9b874174624d472b. 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/TCAHK2301914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b23feb9f87038b9a135618206f010ed0478d15eaac4a2a8c18c169b683f78. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:49Z), 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/TCAHK2301930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238ba2425c9b3948eb14ff2caae3379a3f33d3fd7aadfe875fb3cc417d564d16. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAHK2301935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96f717ae17e92e900cef0cbdaf853e6267bcfecab6d591a28454061d71597c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCAHK2303329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebea77f70c0bab38e2620ef28e8e6ec06fed9aacc1ea577f9d0e11b6347633d. 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/TCAHK2303335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8a6e40af332ef3bd926c5f140bd8098c85ac31e20c1647905599f87fc631ba. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAHK2303338.