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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ec3126848a9aafd171501ec8838ed1a5067979f7adf6c215780db05cadfb1. 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/e5197e95-00f9-4564-ada4-141361240037.json and https://artists.proofprofile.net/proofs/artist/e5197e95-00f9-4564-ada4-141361240037.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ec2893d0e215b292ef6bbb865063eb09da6936ef364334c86cf4f3e61e21e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX53U2043601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c243937003541632c6c0e276929af8455654663b2f30b99925b38e7154823ea. 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/GX53U2043603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98e3326f373d346005d5f9a1b35a3e144fc9f8f38c6012effc92159ae03c9ff. 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/GX53U2043605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82219f157520879a7854786c0e989c567eca6b9fd2c9a9ab9a5d65c49682e74. 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/GX53U2043610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8500bbf6b7464973c9a895225c889c448fcc2498635c53852b6248bf6bea428. 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/GX53U2043609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88833a135f3b009918759b867ac1b4d76678a5df81c1bebc51327fc2262d1fcb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GX53U2043602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da6cb2da2131c18f57e112732f8e9dae8f3d6bb75c20b8865a3b1e6b1a85193. 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/GX53U2043604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f4dae61ede3e98941407a755896b2d994dc71a78a5f3256c204415ee27878f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GX53U2043607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36de2e35cef1f237cc4e72d2d7729e03e1683362908388f35a099fb4d5d0012. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX53U2043608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b37bc90c2480ebb994f637d3a34c08dce136dd3c55d562ab7dbd77ea4206a4a. 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/GBLFP2460874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607d82c360ddc3ed6f76c5734f074d3f46a2553a29ac32a1f370060719a2469. 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/GBLFP2460875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1030c99131aace10856926e6760a64921706c0d7438a31d719dc575affc978c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2460876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa587e3f50dffc66a6322744a76c680b702fc3968ef35748be3e4c0ee779a6ee7. 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/GBLFP2460877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263215e67a27bd6a1ad38e320c9d7828130d5faa3994762cb14f855e43a58fd2. 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/GBLFP2460878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1457f443b7f3c087415ed37c4a8e677a5c142f2958f473211542f3c3385f486d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2460879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130cab29f28dd35a89d78989d58ab1634de959dbe5aac1966ed7d4703d5addfb. 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/GBLFP2460880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34645fd0a0b0b37d694b0bfb4cf6c9dae96b66347e25ad43bb586fc489e4190. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GBLFP2460881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f288084d411bb19bb0b0c75f905d61fce44f18467e2c72af14ad2424a9f618. 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/GBLFP2460883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6d865f74cc2cf7b9d7a64690523e7f052ffddfc67e7b2b322e537d3788f7a6. 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/GBLFP2460884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42237bcf6358f3c117a84bb324db02e5d42606a542b3477e6c809c59fa53ad03. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBLFP2460885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6115ca83e94cd06b43927ec7c71240edd8921d19a90dacfed541f32508965a4. 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/GBLFP2460886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a425077b4a3c7b54299139b30474dc749bfdc2e4bfda1c185ca060599c646ad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2460887.