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 0x6cea7704459a40e109600dccdf6fa8c01e6e9d573005b54cd8405a2d78481a04. 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/31e20a0e-55e9-4a3a-b44e-574843c58d97.json and https://artists.proofprofile.net/proofs/artist/31e20a0e-55e9-4a3a-b44e-574843c58d97.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 0xf35a05941d8161a6bf0b6418f437a786f91a0bbf24d2af8fcb6b50c3776123f9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6G2065764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1bdca71636d4aca683a44e95a12ee98af150ea3572330755bba2f71d41db17. 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/QZK6L2105622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50856d024149158559f30f10c39c743712f4dc189ddd0cc4f8d6f16fd0be129. 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/QZK6L2105623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d615a229bcca5a28f0abd77e24fb50e973b3705b46f1806925f656100000f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6L2105624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f3d7a6030cdff4499f16b0117c7a93f4db322e53efefbca1e1d793b22cc000. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:02Z), 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/QZK6L2105625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59cb446cee1043816a0cc96b5566b817dcfe9065202ef3b09651e85aa657bb1. 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/QZK6L2105626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe573ab507f1f962b616b26fda02935d93795b8f8279fc7c38990fd1f4e6100da. 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/QZNWY2149172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b4c0a0113a5ead28cb42f00159225751f67249c6e6d6fbb9e886a3a0942b96. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:47Z), 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/QZFZ72269806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68b86d9ea993c9f0bb9c97bec05d0ad7abf1b7778be579a050634fc80f19c75. 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/QZMEM2212159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3687c1d8838644a31101d7cdf4b353b55b2ae10c029c506a61bdf99bd201a2cb. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTBA2200973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc7d5dddfc27c58044d005f6b2df5a985eafb6e4b49571ec0f2509fe13c4491. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:26Z), 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/QZTBA2200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e74ef986cecae0f3e39aa7fe4878f24bf1413c62fccc3bb21d8a633bea6601. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTBA2200975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96488679c1f6a32025c4c3c587b1e5423d8b4657366131b2f3c0e8a95cfdf182. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBA2200977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc136a424cb39d442466b9e724a0debf2b40f5d75c1105a3571788015bd9c60. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZWFL2325822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62052f78d4df6e0127346e90f492688b8669aab610f9e7f38764392dafb9e26. 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/QZWFL2325825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617849dd2955fd4ef1695ffe6998bdb3edb5f454e4dd057648d5cc665d1b4a11. 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/QZWFL2325829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f66a23443ea9c53cd43742e9a4137e3cb4d74101c457f796393a67efafe6f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFL2325830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d7612e7b89d8e72cc4a1cb9494f8f5d5004f6d7ad327f8d4568f1f214445a4. 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/QZK6L2353265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf43b96adf1f3138d3fe3befc59fb24bcdbce901cc50e15df064148b8b548d32. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFL2325831.