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 0x24abd61adce8f58d43d7a8e96f3414f66530cdae4c71fb22d5cdeccc8a0f69c5. 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/90fbddee-9c1d-4602-a1d9-7b5a1c2a5752.json and https://artists.proofprofile.net/proofs/artist/90fbddee-9c1d-4602-a1d9-7b5a1c2a5752.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 0xe00735ee428c651d99367af28a0e240dd6c16c3b0d2527ba020b350e7f428176. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEWS21900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650cee78f1279027695abde15e339db22c4b9be4eca3a99a460b8f2fe3a9dd6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:33Z), 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/DEWS21900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e41c4ff87f1015b2cb304a0307213e62c2d2b635e46a5034969aca775120a4d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEWS22000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213d5e48fec0dae6f8e3fb898df26e579c6c940c7b9ae88f2ec84232995e588b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEWS22000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da623ceb61720c66dad8271bc8e0134a8e57a05e8732755fca8df2d9efffe95. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEWS22000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59299c0a43051d6235b603a665a7c29c30dbba24fbd86f95b83916df0773249f. 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/DEWS22000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff728770fa544c7db0c9f192af5473c72d55766ee9a1302618a5ddc8284157. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEWS22000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6e8ca9906d1074fb8542878d5ea85a59325580218bca1715fb743c1af5eb91. 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/DEWS22000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dbf3161944fd2f0715e192298d9df04996f172dcc4713fb0c0f8343834eab2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEWS22000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb54d76dc1f768da1069212c80275d088e315a05227ea9cd1718854f74e7d6b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEWS22000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c6fcb5fea4f1e0114f5500c3c01ce58084f73e5b5259fa4fb1c0f8c162a82d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEWS22000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84813ab9a3be8172b8ddfb1ebf7c49b6560ca8f13a55567a7967db581ec3f2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:32Z), 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/DECE72401169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a55e900da734b4d99940f74d9ae5dfba0b1fb8b138ea142d066c242cb3496e. 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/DECE72402340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d387971906ea7ca1c71e39e76ee585f9696133ccc5620f8c9ce9ef135655f3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DECE72500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adc6d3a07dd60fd8581ae126e0a756cd8c4d6fe844ace4b4a58bdc90627804c. 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/DECE72502087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33916092cf0d682c0f98dbba721dcf6389382b3e796bd5b872dc886a4afad20. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEWS21700071.