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 0x33490b42c006e4b664e65b78b64d983dd78c188a6e5959b95dd61358223c7fd9. 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/1331d6d5-a03a-4536-8745-0addb4b280ba.json and https://artists.proofprofile.net/proofs/artist/1331d6d5-a03a-4536-8745-0addb4b280ba.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 0x14b21cae0f08d7a72c90541306215967156479c3625b9d9db25661165d123e21. 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/USUYG1474718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdfe1146790b9bb09cb3f0ccfee9002c2baf8b40a55ba1a29ace493c32bc43. 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/QZES81920328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f686b624960887b52e618a0efab8f040c8c3b618300d7ce76616b0c6ce5d796. 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/QZTLA2408627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292861d45848f6c1c098b9e52686d068e4c63229a91c4f69c03f9f19ef5bad7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ8B2314702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f10965557ba6343c851fd6237ab3f98761bbdcd6f13e713923e762cb3a8e0. 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/QZSYP2324286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62caf1295e1a03ca01cc3cf2299e017bb1a3141d314b0ba9d88a9c5a57a2835f. 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/QZS7J2323157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11ec16693acc4e9c10dea31ffcc06d861e74cc6a85b10543e2b2ba2e12b341c. 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/USACX2200569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd920d2ea93998797ff877b9679db189625bb2901ac7f7256080a649f48eb4470. 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/QZHN42273305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ebfb9d35214bf8e02083065068cf60a64ab93923b41785cbd0007b8e6d2700. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTL92180622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c27b898e8640ac017cac7262494d71fdbc42f7c13f84accb1fe3cf76b4fb35b. 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/QZQAY2189248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f78bee62e33ea96311dbf20d2882734e97394e213ba546b8cf9d89f916cbeb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5FN2066351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3c4e0b99637972b5c058c5341f7ab1c4297d6d803d97f845eafb5c3e002922. 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/QZHN62044064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630311625adcd89d39c148e887c48a67352dcc28a24efdadad4b989b8bf0ef55. 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/GBWUL2046042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b982b3356644494c57c1b7150573dbb0fd5a2b0b543b4808c20c9c6ffc4c309. 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/QZFYY2089414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b84a3c65f5d5e74a7b6b6721b418497bc90e749fecd76ee2943dc481157bb. 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/QZHNA1942335.