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 0xc0917b235f2cfd2794f2cf7713941f386e4d36a3db4d4335a9827c8ed34c3ffa. 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/cd49fdd6-6c82-43a8-aece-2c502e8a6766.json and https://artists.proofprofile.net/proofs/artist/cd49fdd6-6c82-43a8-aece-2c502e8a6766.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 0x368f2eccf20d93e29871976150a61e5730c4bccec63c3b75313c19983c1f6ac5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNJX2169526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72960219be5b4369a7e31a5c34dd688e2e50cd3859e0705a708924b95b6d2736. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNJY2237481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c21604cbd813aa4f8c97101a56b8b06170acb7f216e5f9ea9e086c68d1667f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:31:33Z), 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/QZWFQ2475741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cfada9a1cd88753378e6599b06cfa13d385e3cbde8158dc4d3340203522f09. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:49Z), 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/QZHNB2507193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc863deddd8c810a0fe547f924c310bac36490c008e6326c822a53440292757e4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:17:10Z), 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/QZNWQ2523880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b341f6fc4247b49613fcd6795b1afa6ee387438b076918b4c5746f06259ac. 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/QZTAY2503009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad615c6e6e227c3de8437a732739f3c0463154a61b00c6072a0ce3d390238dc0. 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/QZTAY2503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f2a369580f5bd4868b4f7f48ad93161f9e139389d4044058b93b27dcfc5e4. 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/QZTAY2503011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0820d073506c63bff86b53099532a2ad6cda35e0d99a0ebab5e7972a173f1025. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:51Z), 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/QZTAY2503012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e004ac630058b158b967c4840508fd1bf70724440dd189f3426ce22fa5d30e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:44Z), 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/QZTB72562218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914f1c9004981a47467768de24c1950961288a3855657c758423ac10eae102d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:09:46Z), 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/QZWFM2586305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801721988c580cdd92290e3cd4d2ac3314c9b815899ed0ca2ea096640cffb24. 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/QZWFN2391017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a47611017b75a34b5713dda266237ad172db8f1cef05326d3a17cc4826dec8. 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/QZWFN2391019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2bcdfc384a6e79a83230d237c1aeaf57462a91e757710b470b03dff1c5e289. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFN2391016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a164fe5e153a728964ffef543a3d92bfda0e4817df712275a038acd45f82314. 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/QZWFN2391010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc8e6093b0a526a658758e5043c6222f0c4eb873c0243abe0a6b4a3b1f224f. 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/QZWFN2391012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61268ab1e02cbe4f6cd9f4e0475021425f1164f9ea94929178601ac2404a04d0. 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/QZWFN2391015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65566fec11953c06bb28572e4317970dd42e541a158fa32094659287b32fefdb. 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/QZWFN2391014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b01ef3576b1cafe6872fcbb04e3cbbcd6d95eddce81401592b9739dcdc7094. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4f5b223e7b3dd093e3a0c69113c737fc11fe261dcd26af5e9ceb47f387ab15. 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/QZWFN2391018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b65962d4f1d3f76534ebfdf772cec68c1f0e6b1f104eb0ea78066f0f88f37a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22877dd8a313ef3f66c44582ecf558918b45a5374bfb76845a5beec347afa65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc50843873cdbd4c4cbb0e0547a4bac8fd5fa01d06dee036a044fc3ec2a73575. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2391009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ac7ddecedc25d57b6b41829b25f56e0c3a3a91a9087c77e1a166ccfa69f3b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2484332.