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 0x3487e2316256c5bda627fb259bd5843bb1bb64fd9512682d93bdb9aedeab3c5c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc1809fc-cf5d-4364-8ba1-3ad686990879.json and https://artists.proofprofile.net/proofs/artist/dc1809fc-cf5d-4364-8ba1-3ad686990879.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 0xdfe5fff6afd3c8ec2838b4fd09930569e05f677d38d35bb2739c8b4be575eaf7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:30Z), 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/JPW462436815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e00daf22daf4c7075dde803e16a192fae9f2db4c0a1e4cfb415a7548954b91. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:18Z), 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/JPW462436816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80a72c0dcc56af63c44ab8ec951a6bc587eb04fcdc875dfb99c8ce28df67fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:26Z), 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/JPW462436817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e18901b7dd829692c8eb5ea80cd4131175f5be315b6ece1351322f248222c2c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPW462436818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366959a57c92a50dde5153b02ea30df1a39389aee4c65254d00f9f6e73bbc03a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:13Z), 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/JPW462436819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ad19a8b61de5b327c2bfbc5f0f283008236aefa3515ef02a887e6d7fc94571. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:47Z), 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/JPW462436820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aad6539af7ed69923b8fca7d54fee8cf16d44ab5a761432a8d9ea07a10cc9ee. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPW462442717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861675d859741ad67294d1eb8aed93421a99f775f04c43f4f1136aadd1d83a32. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPW462442718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f51db1a5291c17c986347f3abc956468af1a5d646988b3cbe184dfecd52550d. 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/JPW462442719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a17aa8a0e190599715fad4ef0d4fdb0b9316b3a876e0c888520c46ac619ff5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPW462442720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc897ba7da91dc5517261c2dba536d5f6a8b728d65c20c2f971e11c23fc3f91d5. 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/JPW462442721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18aa6ec0092cd0d11e92ac4b17f1e442100b6eed662ea9adeabacd8943bb0a4. 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/JPW462502651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb840fcc287a1e9fe63a7caf0685c733e58eed13148be3142c311f95adb634d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPW462502652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83707cfc71028542e086ce48f3d89f754ffa20ea73af37fe0ba708ee3658bf0. 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/JPW462502653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf26f6fee769b58d26d51a296bfafd6f5601816f58b8ddc2964a7a9a57fe58b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/JPW462502654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c28b2b764085b1844320ecaa7c075ac6082583a5cf246d3478bdfcc29bb4d9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPW462502655.