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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 0xef6c369b7ad2a2bf82e696cafc7c42227fbb0d18c60dab7e55c6207b51b0224a. 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/9c3c78df-e9f3-483b-8f71-e9c69fa22d3c.json and https://artists.proofprofile.net/proofs/artist/9c3c78df-e9f3-483b-8f71-e9c69fa22d3c.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 0x26e2c3c8e165b52123d353c755f3fc03ea24f36ee5e18ef00c34f0425cef8bc7. 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/USL4Q2210525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3030b72f894d372b0bee1a41c0ff747f95bcda4733378e4c6c047195e9c7ba6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2210531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8611175b0975f70138d76a30e108c4f4c965735d8d7c9aa633fd553f5d44adbd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:17Z), 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/USL4Q2210533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b617fc6cc5ee6be5a2987dc0ec6e382c53212e0f971009c50297e9f00f7e72. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USL4Q2210534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5476c7a17a8d8d8657db31eb807e27aa3928a64e3d585bc18e46411319b0d90. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q2210536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8439f0c8c9649a687cc25e107daaf9fe148a79eebd85b24200ec6de309329d9f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USCGJ2335743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64f7887b6c15298c1b0471a5784dd499bcecb1649beb6e63a73771ee5d2041. 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/USCGJ2335767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c18fa3bce7a7b6e99c7e961a37235ed27c1b6c9b8fb79c370699162a44bb401. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USCGJ2335766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe22e75917dea4a815e6ba3f188719bad4a7edfea91ee90759fa5b773b4c09c8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ2335776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea5957cb0bfb568ee74a69196f6b5a589989b92631ff4b1fa6f368e91be8860. 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/USCGJ2335822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1e2ec658116e0b80faa1785e725ee27e22b576396fe7caafc16ad08a5c910. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USCGJ2335838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6459f151c0a8ec59bbabf577ee640c22d9f4734d4f9702bced45770e5418b7ae. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USCGJ2335843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205746fe268f2b23f01794e313b214eac183f3fc65cc63e00466d65e63d36f3a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:06Z), 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/USHM92478707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c0b55871a22483674ea1c09d6fe25df018a3a8c53ad7776a7c8464d4122771. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:37Z), 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/QZPEW2516027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f0636842534ac6733f3eedc76d09374818c9e1360b71e8e7d34c1552f1924. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZPEW2516025.