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 0xbf10bb757ed85ba9b49ba5c9a95dee196c73a31a9c796ec6f9e31f917e2bfde7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa758dd1-2df3-4d50-966e-8330aa72b9d6.json and https://artists.proofprofile.net/proofs/artist/fa758dd1-2df3-4d50-966e-8330aa72b9d6.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 0xfc47168a48b21eb94f46c579ebfcb067390a16450744b58019a6381c41f1ea92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHA2356270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb659cd9e5afe3af806e5eb2d9be3567dded830d60a91ee014f9dad7f4ca93a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAEK1950247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4329bf118152517632b6d8b6a4714b321a9a16919ff07745d77501bbd349993. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCAEK1950252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7defd23efe4e32c35612971f0c8649b861a0de2d9778a30b647bf094c5ab40. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGS2358794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2059d4c85f648fbe35bc5aa8d340bcfa887ed47da349a49a953c00725d2ffbf9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGS2358797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a1f782fb573de9c20f9a478b278c93645e821cfc178fc97a108cf41b1a51d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGS2358807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4730de1ca1bcca11d1aa9835b8fc4f2b7c46930d66e291fa57ec07f4a596d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGS2358814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d8f8009a04bc3ac8eb3f16566d5f1ace7a32acbe1bebded6d59ad4b8211f5. 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/TCAGS2358855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdebc1d653c49cbb8a869eb32df3b7b607847c59969329acaf773cf9eb3dfc5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCAGS2358733.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c774424e18ddb085063ca2b440fd6c5f2732b8e50c5007d2b5bf9851ad7d8c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHA2356320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c0a5c8deba5a356f71acfbd00b98d8baf6ee89310164113383438d3f8e9c5b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAHA2356323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17acae17b0833b130655c0d646ea26519b8b4dc5928cb24bb3faf5465d1f64bf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAHA2356325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72391c3e070b7c281220f0fb473242e3ad3b6512d768fab150eafffabe8b26c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAHA2356327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f598ba0c51efe456d1daacd67444447a0bcf212a0c1ca0a344043917a60908. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:56:15Z), 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/TCAHP2335474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3154f4e0221d51f2548b2e9e42099c74fd239a87876cc2448f1949861451ef5b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHX2435564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875158bbb30c948824a6a9c7ce3b0a2eef2af6391d5d2ed975274b3e01f2d6f9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TCAHX2435380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5053db8858c91f5fad532af7eb02ad9ec74d4bf204560ec774e781d003fecdb9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAHD2333868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006eeb3df6901406d84dc751dbc67df7ca38ecefde1b1d00f388ffedac2fb7d0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAHJ2398537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e653b21f0ba2f9ab30cbb3b379e0c4c4fde178e0987d03c4d3b2007f632053. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHH2360350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4db0e134f08e02b027707bae50fb8a092311720a46f22742c96b946dc0f2f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAHX2435618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fe3d93c8fcaa26cbd355c4899d10eab202400b2ac76a705099946442f13376. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCAHX2435622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2062dcd79aa27b3e61e40f7322a537a4b45b084ea1ef1ef092f277b083f33814. 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/TCAIP2418347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11acf8677f34553d9a69aad63287b2ebce37e4fb473b2e7dc59b75f97fae8cab. 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/TCAIP2418376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c9c63d85c02bf5bf49ab93e9af8fabf01657d308e83d5ff9acc86676358dca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAIQ2418415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5963a8b5e61ae2c71862732a7081e4d3757c7154bee6dc6659c5c9e80de728a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAIP2418420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df44b35c32df2821255edc94bb2f8d2648c1561a42351e1e4002320a6d68e4f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAIP2418433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61404c1f85211cd2b7cb8287ea837d5db5b73a856c921b0911730e39eb4e148c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAIP2418351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdda30866b1cf0802d4849905b59ecb764d201f73f6846c3da2f8ba679fdc1c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAIP2418381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e03de186d84bf8f4b9d24002a32ce48f06a32c7bb6b454d8dad2593f7fd3b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAIP2418389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ed8098ca6d1ac1c258552eb857eb37dec451e5bea82282c5c90deb7561552. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAIQ2418395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576686dcfcbe45cf7f1fb7ed242c141a76a4c3d1029e2709d86977e28f0c7da9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAIQ2405641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e00b69ed3dc43b0a6aec57cd103b36ff9840bd230dff0ae31051f1e95d482a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAIP2418411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e96b546171beecae4877d5b8e709d91e2b613f403da6ff90a6199f7a19cac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAIQ2418423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e1184f705508695d9154e92ed62c91ffae234da4ff995d8d69d6c3c6e5a281. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAIQ2418437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8d062a21bbce693c3dd7a7ef465e9b68c219234c9fc890e631ae77c97040b8. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCAJH2571883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbffcafb04a82fd54f2119d4f4baeadb11ba616ef303a8e9911898d554cf52b3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6SA2261116.