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 0x01dd457d31cc1b9c8980b7d40a4a17366f4e48452b758f2eebf726beaa792154. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c661d85f-f4e6-4356-89ec-a5421d9226be.json and https://artists.proofprofile.net/proofs/artist/c661d85f-f4e6-4356-89ec-a5421d9226be.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 0x0c1d5e421083ecb911898759d0ff9b229dbe97fc4836a8f90a12f4ed158aabb9. 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/CA5KR2366572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c7f4e3dc80cb580b581d4cb69fc71671f886bfaaae893a22f8baa6dd66e70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2373345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d5e421083ecb911898759d0ff9b229dbe97fc4836a8f90a12f4ed158aabb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2366572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91830528ee996f9c357fb81096b7696beb40c8e15df317f95ab696e0588c0c3a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2388403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd2aad9654f026d5c1ff101d1f91532cbd8b6dc026dbe562e3b6b9460ac5bf5. 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/CA5KR2388405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd8716d82daa67ae03cd6a134ea56d4206f33d86267817c3d4eb3ba573dddc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2388409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69298694f2d28ee459041486347e4f215c65aa67d3f4eec514aebcbc972990a. 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/CA5KR2374993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b260db8d20d84332db1015c43edd5f87a986bec951cbb46de466dcf9f83b2d5. 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/CA5KR2374994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8d53661e43a146ec219e21e38a552c7f9cbfd91d10bed9ec8b978e702f8661. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2374995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8146af095294fb93f26d433f0073713ee411ce7316892ae25f673731b77c924. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2374996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d5e421083ecb911898759d0ff9b229dbe97fc4836a8f90a12f4ed158aabb9. 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/CA5KR2366572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac226e065a43e582a47026171355112a3a8726b17131ac8fb2ca6934a7aae19. 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/CA5KR2374997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082da39cbfeb7505d687df4f38e1208148e8921ed6d98abac158a113f8367342. 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/CA5KR2374998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c7f4e3dc80cb580b581d4cb69fc71671f886bfaaae893a22f8baa6dd66e70. 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/CA5KR2373345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a12f2315367f7dc3b9c9fa883cc7736ef05c81d61e14c736dc348e31226a62. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2375402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f22124f26184b246ddf52e7b4a3a0f76f91e76247ec921743270b72b71f645. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2339020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adaab33fe4b33a10af114c20ef1fbba5819bf8922d0ac49f16b386e8efeeebf. 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/CA5KR2339021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe381fbdefc173ea81128befae8dc14b7fd4c620b162933be4e134b18d3b1e5f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2339022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e535f0b06c3a591736af6e521b892f0865cc7b10e11a50f086fa2ebfaada94. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2339023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c86f2867bf7313708fff30343597abc4fb671723b33847f6047fa45ca5dc91d. 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/CA5KR2343850.