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 0xf706028f2487ceb1974f7d28104de5202668a11595725a5d2cf85f9bc874812b. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89c7fec0-fb78-4b34-8817-ad5b35f32ce8.json and https://artists.proofprofile.net/proofs/artist/89c7fec0-fb78-4b34-8817-ad5b35f32ce8.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 0x538703f613522c7424b7bd90c9172463cf777c26acb9b9983988988d562762bd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPU2374523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52986b888303431f493ba47c48f5ca19def7a3b6778f71a13a25c1ce0df0c22. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCJPU2374527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8750c86691d0c603480337a5feba2d532b85a07b35ca4b0bb01359628d8552. 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/TCJPU2374543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25b7a6e98767bade14b135742326fdedfa94f091bead57241e1ab3737c64ab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPU2374551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4223c4ea0ffaf13be901526b74e54dcdd7fbe666d63fd99a7d8778b645d39b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPU2376762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601c18aea7241a5c5671e95de0c22dbd94d04092ca3e96f19eaa00086e5f72a0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPU2376763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b567c06423ab8de235ecb23de05a84a70fdf8c4d394090b0747f9f1a35500cf. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCJPU2376770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426d8bf6b21d4dd56d2b3f298fb4d009e192e6292fe7ad3c471fb1c99ae0f7f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:00:54Z), 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/TCJPU2376772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600b86078afe902f2d310c82a8c0d2527ea09840cba69299df927aad72b31b1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:36Z), 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/TCJPU2376775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37f060d215d899ef556c7181de418bb1a4bc0297b5ea08792da68c2256031bd. 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/TCJPU2376777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456aaea44dd57581d1225c3396c09cbdd2ed00a459c50cfa47b499b763c5bbbd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:39:17Z), 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/TCJPQ2294363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3acc45e3cdafc4f4bc6d0bab507174ae2513a852c704cdb5c91cb65d61a6cd5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:53Z), 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/TCJPU2377156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff93d7257976188101d5554e2d7165f239a497fd634c11ce24ec92fe89b254e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCJPU2377161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8d44701dd8da1acfee2bfdc3d1cbae2f7094abf3f16eec463f06ac6a84ee51. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCJPU2377165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe13a175142e6c457e104c86412af4a951aa4465d977b798f16a9ae28b0bb321. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCJPU2377170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b9a88fbcc578f2d8237f6d753ed8ca639769a2d7722a810f27278047d0511. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPU2377174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c31fe5e380d5829df78cc3be73a12d0a2a42c17fb7fdde29077d63e5181fd4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:53Z), 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/TCJPU2377179.