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 0x74ff1c32235dd58af79996c025c338ee23298182ef19d3ae5e91814e16edb21b. 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/cb982a7b-a83a-43d0-ae0f-f7992de53618.json and https://artists.proofprofile.net/proofs/artist/cb982a7b-a83a-43d0-ae0f-f7992de53618.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 0x2f387cb01276b210b648455942b5b24b0a0e8add8a3a90a53d62b1a4c6c0ddce. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:02:06Z), 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/ES81G2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b55dc3e3463ef6fd8ed7480c0f58aa6c3cb4867fe1836a022fe43ec7efcc737. 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/ES81G2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ebcdb062512275503e6f6f0903814f6983a78ccd569e115553e4c5171f401. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2P2118791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47800d0ae9e95460288b8655ca4f26cdcfe95d9c33fe435847567fdacac88238. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2118793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47800d0ae9e95460288b8655ca4f26cdcfe95d9c33fe435847567fdacac88238. 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/USA2P2118793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ebcdb062512275503e6f6f0903814f6983a78ccd569e115553e4c5171f401. 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/USA2P2118791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5509350184e4ff0c2265754900ae60dc3352c730cda9acd230525f9b7fd7e31. 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/USA2P2134956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92cf5cafc75308292ef2104b2fd7f871aa54f4bc8453013ff969a94e1851515. 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/USA2P2134957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc130f905a2614c4cd3d29feb365b33bd420529744cbea27deebb72e4681a340a. 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/USA2P2134960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013668189adfdba01a3d67a8ec53ba8c01b6a002c1ded2d0b10ad2a15284a9a. 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/USA2P2134958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902076cecc80413af1f7ff189601c5101eb267213a84c55806b495635c3702d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:07Z), 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/USA2P2161793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372ca3be970c7fc09be9cce63f54a53341af5137f31fc16408fe5f1ad53c1664. 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/USA2P2213362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ca2d3a7f3dd7c55514abe4c25fc015a1c84335f211046a3d068a5112adb1d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2P2243203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519356310cf737dc9ce4cf07262b3576c2497ab78329d8bdb69354b7295d30b4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2228027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232346b86109eea0969daa0c30157fb2cfe5d615325403d73a7b901a6a73932f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA2P2311325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bec9c0454a014e47271a73dc42872749db667672ed2a4c0ff91b1bcafe41c60. 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/USA2P2323453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7452e40bd8cb69f00cf43bd975d388ed4dcccce97777144d5a91385a65058dc1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2355021.