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 0x53cd9e2955b7162190c202c75190407265582efa4208073dc578cc532db17b1a. 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/1b61f283-5486-4969-a110-1e8a2a815666.json and https://artists.proofprofile.net/proofs/artist/1b61f283-5486-4969-a110-1e8a2a815666.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 0x4ede1cd0f2dc68da5d15659c44f9690cdc8875c8f2e10f0c6022207c9f696fe6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1D2111532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb9f5af447d09717aef2ee51137a51637e32e0b5e696baa8a33d9e39cbab77. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUA1D2114472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a2bc7db1c0fa21785141c130caa1a1a8711aa76b6cb833f34abda9b290ea9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUA1D2135012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a293f85760d1878ee337521b8cbed62292e49d1abe4cd235ae89d0aa823f13d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/RUA1D2154887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e758d079fff970da34a44725552546484a1761386670ad6d7f6774157aeceb8. 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/RUA1D2232052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0ab3dc77181d2055a5b53d70ac880432632bc589d2064209966321b4f05e8f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/RUA1D2281315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6168fc65850ba2855aab611b3dfe53b62b80612d376fa1815bd91cd4b2ff2eae. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUA1D2296891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6caf208fd4c58106783bb8ae8ccd1f106222ec0a96aae246f3203a6ab054e6. 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/RUA1D2306855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd831208dc87426c4c7365974a421c7d0f73c91e8201faf4783b8638c18041544. 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/QZMZ92328470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4679b371036dd9189871e5dc9746933b0264dfe1d5eb0095ec3cbd319655adbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMZ92328471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc181c9587fff186cb4bb964b90c2058febd63c7945e854b055ce0223cd81a28. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZMZ92328477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8cbb78d913102a2180d1bdca6cbefedb7a14ec7a1dd4316b63f7fd85ce5ce6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZMZ92328479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01de784c55ba4bd582d62bb12c5e30c83076d9b066ff96000490795e31662531. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA0M2382558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed40323dc90efa78fd8df102602f5ce8c2d3d09e68cad7e44cd3ecf9d1b9f8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1D2408236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00788cf1b05470ad718bed771fbbdf0d139f6c2db1223a40a725e0b38c8d4d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUA1D2439525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648354039a6efd3de08099c79032e6e5a107d1445df29fbdd571d36a1ca07a86. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUAGT2434943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5e17ff75974e7fe025bc78fa9614d77a50404aa7c71055ba4bc9b38defc070. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/RUAGT2434946.