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 0x86d927756a6ccea4be2f95e3ce32d817617fb320ab7b2863dc7e4a5aa1b43ef2. 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/d2250440-1044-44e1-a1b5-f5b04e2cf1a4.json and https://artists.proofprofile.net/proofs/artist/d2250440-1044-44e1-a1b5-f5b04e2cf1a4.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 0x4b94f1f203f5960547002cd8a7e98fcc1dc61ac497e213e9a77368c3ae4e6d48. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GX38U2216525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39dd1de7830a2a7518f7337da2b4bf9d95044beb167df66b1feb86f29ec2717. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RUA1D2268296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0fd50d63c847be7f4b36b10abf84f4ebdb0398907de9eae022bdbe34cb5ae4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUA1D2277492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5827e0ec2d1b8245d823591539d94b3128e349b864c874b31c84001711537. 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/RUA1D2277493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28413c4a524dbc93c986933a96d568514159893082ac6f51a59121202c2ca8e8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUA1D2293808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d53ac7b65bf92f61352b7bf4cea51df4b6762aa435e34607b157fd9121f7b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/RUA1D2295004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936fc0a15c2284fbc0d8c333781d6b97a7d32554d925596595b6159a1be7422a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUA1D2294957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed99865d3e571473159924c69535456f4992f3395757ea8bcad3f18a6914b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW2347135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00ddbfa9358e03c2223bd0975ef001439f2f61bbb7399502e26eb0dc400990. 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/QMBZ92360417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570726c91b7eedf997b505380f172d7301fa8781e3b4edc22de334a28098325. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:34Z), 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/QM6MZ2405598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3affad8df1de29393170937b1100688e57c6daddf50cb4e12bf6ff196b45b0f3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUAGV2500868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59de7c4fa854693f776d5552c6bee0330588cfe8c0264571565f57da6fcb3b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:50Z), 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/RUAGV2501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1823d200ec988490dac6abcccaf5535b8230cade3af735cc0e4c52ac0577dae9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:58Z), 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/RUAGV2501394.