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 0x335d80b813ad760c37cdbaa2a1bfdd23206d3194a79f5626c7d5b88bdc18fb18. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19551c08-9640-430c-a738-c14dedc2de89.json and https://artists.proofprofile.net/proofs/artist/19551c08-9640-430c-a738-c14dedc2de89.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 0xaab6edaa30fb6333092f9a15b34db7ce73d8435d8b9eec7456b1f5923aa7a3b8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:13:03Z), 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/QZRP42177890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a335f7cf2c4543217d14d7bfe957190d0dadcaff50072c146bd1b06bf0770. 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/QZTAW2231767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8a728d6897abc380048d111340a58c887d59de149cf1636c2a7f886703636a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:28Z), 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/QZDA62341123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34022fe25535259ce5edaa955e1db291fa148a40949da03b8edcdeb82d7ee5a4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:37Z), 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/QZHN32426483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd844dc8c0580e64d4c1747d2d1bab83d640a5d261086e63227e2e4a4b048563. 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/QZK6L2448161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404fcda4b8ce373377ccb2ae282fa877ef54c4c27bd09e766ca9acac5af051a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:21Z), 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/QZRP52185325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836e57c8fe6311f99a5f96a922f4a201ba934daa3dca17630baebe98f968879. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:09:44Z), 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/QZTB42326185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca596fa88b6da956c4bdef1ecf5f3615dc156a14f647df97b2651123dc07bcf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZRP52185321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e497305a61c4d0122db0d0b6411ef181e0aab61116fadcbf4d79e331a1d736f. 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/QZRP52185320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9cee84a4afc8882ea283cfbc650f15732e8955f7782558d2da304cdfc99efa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB42326182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a65a66c438f1d99725e7eebe72e83086ab2fd7365ce8150c75816532c4a55fd. 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/QZTB42326184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d02f004f141ccf3c741354c2595688cfc14770b73b0eedf61cd9b41bace0cc6. 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/QZTBE2494765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81ac6f106790ca28faabb49643728700410b0df1504a671a23c981dcb767123. 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/QZDA72542793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5537f7342d9a7a2ea4825c26837c358e8530c07518e841b9068e3720b8272d5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA72544623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9504e56eeb95cd5d44f93be81132a9348024d3d8fb91fc8dd2c189c6334897b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA72544616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215289848b57597841eb4077a05c1cc1bf46f18fee99c673ed204ac20fb90661. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZDA72544621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d1ccdb8a4010ae71cad90ba2aa2100ceed9be5c184231c7e011adab95253e7. 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/QZDA72559867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498de65f9c1d746e36c2e57f3c10814d4afd00a32e72a1807eb4ebfc4e838fbd. 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/QZTAY2592334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a1981c8636859b1a1c5ad64f2fcf2e14b75fafb0626b104ca685a31eafdad. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB42326183.