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 0x890facca208d3f05ccb8c1b1fd36d2f8bd28c4b40cfe926026827dfb069d8242. 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/f00bd59e-af92-41ed-888a-2607539e50bb.json and https://artists.proofprofile.net/proofs/artist/f00bd59e-af92-41ed-888a-2607539e50bb.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 0x2516bce6f497cab866ebc2c0d3e9965b17a7ec9ed700131fb4ea428bb8903552. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:38Z), 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/CA5KR2066118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68707807d8ee818f373dbe5ff6552330565b727af7c734e7df5c1798542acf26. 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/CA5KR2156008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95af58cd90649ae860721877c09ab14a1933f676d7c6c45e0c24bb699ef3f4e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CA5KR2181823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dfdaa4b0c69f6198c7dbb908b2948545c721f16bb48152ef8c181a606f053b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CA5KR2201929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11078d52252754d92560ba2a425c2bfb6bb732a8ce9b15e00411a726216d9efd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:13Z), 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/CA5KR2273723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe950a7c61a98857bfc7a424fce741cd3d01030ddd11c7cd68be704338365c44f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZEB2303358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba05354f1e9eae04e346f87819bfab954db1194de0573c57c7a70e1acf8e5bb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3DF2433923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87ccd590baba4ad089d0ec744d2303db78d178bc0fbe167e7d44804131c76aa. 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/US3DF2467206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eb2bbe4d72b54bed90ab88b827b17590e2750a6eaa8a775600f3dfede933d4. 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/US3DF2490919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318395cc50a4c8390b0b94ab029e02abd45c336fe098f415251fa1eb202b9c6. 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/US3DF2490920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e99d07ca0127e7c418ed2d44717f42759b844df26dd79aa8b2f066c3150331. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2409543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62aaf7a13c3fc63da59d33d3355f46a6e8482f15a4f6bebfa8542a6da32c1f3. 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/USANG2419667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa156f54e3e33072cfe6002bc9015996f7e687f910ad72e233e731b01138b9a8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USANG2423324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46c7ed7920ec4838e518af64f686795946383502c8791116687b3285a9100a1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:02Z), 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/USANG2431992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61e95f9f29cbb3a5697510ec0862c8f3b9ceb97695fe182b6510c54fedc2f57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGR2287480.