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 0xa271dcb7576f1ebb4d2bb1f8047b092d892e1311b7ecbe8a636cbbf258a238ca. 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/84dc812e-456b-49e2-a518-ec86e42d4493.json and https://artists.proofprofile.net/proofs/artist/84dc812e-456b-49e2-a518-ec86e42d4493.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 0xfe37aabd8e29287a3978bfb2b8c58ce86a8c1642c3467ed02cec8be2d71217d0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM80723410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e6ac7ccfc84d0d75bd7955f100fb8a5a027dc7986b27b5ad0035fd755cb361. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM80723411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe979727fe50fd7c5464834cd406fecb62326374d7a799dab2bf7636a63b2ec. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:29:32Z), 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/USHM80723412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22597b6d303cd2c6a1bd51759d249af254cd0b6b8058106d5e5c55c84bff318e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:48:07Z), 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/USHM80723413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb768b0b84f64f8acb0f6a49b460b56dc8e1ec05cdaf55807ba5a1cb602065853. 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/USHM80723414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d11b7a72ed3006a24b9565a2d420c29decb85bb3579a10634b17a9cb4be01. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USHM80723415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bfddacf0c5980f83be4ad4a27438c8021d3729215236dc7a1a17600c4b6081. 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/USHM80723416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548f76ddc315937246d76f6c77bb10969d41658c7c2d98adde85f2d578366f1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USHM80723417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c584e0df65a17aec7566423e93f66b5d948aa1a332d851f5d648ef3f3cf2cf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM80723418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec46ae5df77f38d50925e849598c7ceb775b9954e7f5194ad2fe5715c6a44205. 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/USHM80723419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a92cf35e2ad710466e4b8196c6f30d282f1b2bc77093179aab93a6916701190. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USHM80723421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f6b8b0c2c678e4cb2569b47d8ba2545af1cadd87b692d46595fd31f265de02. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM80723422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d801db7cd3459c6334cef33f4a7fd31e1d93267a9e4f56f6e6845aabf23a8f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM80723423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53387d2f91427d9d33a2a018bb5dd3081ce2cce469aaefd8edb391f4c0c7eef. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:27Z), 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/USCGH0855625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0580ae3296206519b1135ab1d03e7db2a6106cda636dcf5a6604ad0b9673c90. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM20836339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6499e6db5b9205ceaa52e2db0ce27187960254e60d5cba85fe9f7428cac29f7c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:48:55Z), 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/USHM20836343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac181efff818c18f89a15c391ff5357e740c79fbaf053435929bf10dffacc75. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:22Z), 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/USHM21108319.