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 0x04de927d06470319efe35fa6344b9972bf95ce0ea14d0b51b8bd688aab032a8d. 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/4f55fa2b-4eb6-4c4a-aa69-6a23a25377e6.json and https://artists.proofprofile.net/proofs/artist/4f55fa2b-4eb6-4c4a-aa69-6a23a25377e6.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 0xf76f3f94ce75b3b495fe4db0d8134e575a8e3a0301a705696b1b1943f3ecc5dd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRQ4H2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2c7587635daade9c8a0fb0ed4ebedfb0233426033bbc6ef4200810e0144888. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:42Z), 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/BRQ4H2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920191e147ef76b109511b63530c2360103d344d1dc008e4eea4c6c34dec01a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BRQ4H2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf9b60f0fb8cba25d6194bf55f72f8824ebf2211016026a64b07992eaf3b2a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRQ4H2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7a4cb9959954dc19ab213c808a2f49926faabfb114f7b3dd91cd3f8eff0f65. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BRQ4H2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4930475d3544ace3fe5bc3760c55b98be7679ba4c044a2409a7c0c7c3c7cabd. 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/BRQ4H2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebc1b71415b1e08d15416a17ad231a3af02c2cf9cd8e0499e2ff56c331ce220. 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/BRQ4H2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdbaea6e53b49ddccc38c3e87f489b9680a3fa54dc766d87c235f7eb9d461cc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRQ4H2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c312b3cbe7a837b944aa4fac02e7a90ce5647d005e2e4e6172c5a2006e9fd5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRQ4H2223823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdafd25c02e9550fd328b12866769582c4f6c30667b6f0536cf1641478818d02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQ4H2223826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13948a5b0699aca4b48f808aa79e0dbbdb3c9f9fc2c90dce85c34c8c04cc923. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2223827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fd64cb86d4bfe1ca5a487f4e4ca6b06194d5ce76d451f95404b7fff73b0df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2223828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45f0349c121840f072c551e354009f6b77f04005038c362fea80d585979f0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2223829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80fca049a2b67954987284660e744fd05ef9f5bfbd7e1fc85fdd73886b02be3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13664dcf60b533a2f4d9b995e1715d409f43589757895f3c3a30307846b57272. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44d06fde84b8dbb4f29bb212b9a2e507c67a676c61553ae845d3fe566c0d5e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQ4H2223830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae335482352ee32ffc4ecaf14cef348a6767c775ef162998da5a27809c90ca24. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQ4H2223831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500aba842dbaea896c5f6d93295dfaf4c71a024e5038bfb35938fb8537b625c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRQ4H2223832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c312b3cbe7a837b944aa4fac02e7a90ce5647d005e2e4e6172c5a2006e9fd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRQ4H2223823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c749ed42798afe7c55980544e9710e2c048cbcaa2394808032caa24f4cdd4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQ4H2223833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4804f87de66c5eefee83231a0237679dc745ae0931bc565b6671f100eb562b. 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/BRQ4H2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94480d574f9488e36227ab391c3f091f2f5384df15484484c717110d69342f21. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRQ4H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83141d4e046382a8497239635c5fa7de9a77fc2390dc91f5075f84ec5bde9f4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRQ4H2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa311d2a0b4efbcc4ab63feb872c943d38d8c095e4b6d00e37d69155801730e27. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXD2J2400010.