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 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 0x7d63a2513eaf2dca0424df3cf1a29532889dc14aa62106fbb5a249f7ab032427. 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/e3ad9cd4-1165-4c4c-b471-659d453f7adc.json and https://artists.proofprofile.net/proofs/artist/e3ad9cd4-1165-4c4c-b471-659d453f7adc.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 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 0x1f4016f844511df8f9cdea39e96f9771e43c2356a1297a7aa96d994828ab2ced. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPX492000479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151eb90c13896566b422475acb1f5c748c18c0463a8dfacb06584a40c1a3d360. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPX492000480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90a9d1544c5e4ef305489a537c3bb68e3b11f62ad1656f6951ae74167e7bd1d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPX492000482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe798d3231d6297404b7f5faf4cb7c70286dce74e4e4fdac814fc858561162e0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPG102100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d458aa9c302f50d2766935b14416d3a21833f9b6b68f73faafc3f0ddd29fbb. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/JP92N2247007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d16e02113c9f6217957531ebb216fdd9243296eb7e8f5e8b1c21ec54c28fa8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPB602146187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94104cab7af257f6b08321328804921295450ef86c198c1d51c948ff23098afc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92N2221753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92cd7cd5770f812957fc0c7c411652e128526edb63852f8bcd80c014ecacbbc. 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/JP92N2247008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb19211fdf6a4f80a070c1eb52fea528200b00b50df845c5ceb306498e09c8b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JP92N2350196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13ffb238cc7caf9f619b0a744ab4f6a6c90ba9a7cb0c57708220e5ea70a0e1a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JP92N2333591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275c690b036b3024248e1c944f640ebc1bacfb6f3b0c6b23b06553e1960b51da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92N2315875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25b0af971e7073a4d9a869fd9ff3ad26a679132b3452161d32b258f393f715c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JP92N2259410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e242f7cad9ee0ba931143863d46b92fc63b35b39e427db310976ccfac68e49. 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/JPB602400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74426a3e17598af440403d6f56f4c101767c07b39540f3c84d222d7293f5d661. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPB602400533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162b29bb8e1be1b7fb64579090056af5f33b4f7088f92c4fa98eb34afccef62. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JP92N2417655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59d6143fa271d3967d69737d711da2991cf822f72a584520a4b64518c43d58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPB602403671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59d6143fa271d3967d69737d711da2991cf822f72a584520a4b64518c43d58. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB602403671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66658849fe404b94ac079804c1a3264b922f2bdb6ddafff71df7f917598a6f53. 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/JPB602500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162b29bb8e1be1b7fb64579090056af5f33b4f7088f92c4fa98eb34afccef62. 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/JP92N2417655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8014698e58a3d4d27b4ce5c30e018d811e4c1b528c888f079b6c59aa206698. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPB602500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c81cdf6738d14c01a4265bf0d36462c0920a46eb684f7bc8cce1b0a2ed22da0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JP92N2439279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b727056dd54f127d20cce6465d883091bbbdfe2ecf793ad6458c58e82a5e6d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPB602500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4c8a8bf35bda189676e1eabb850a88c9e272862d550540d2d02d285c9d0e7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPB602501722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007b5ba0cabe30d2e793a770c9b62040f9c2f736343fed74337a132b3c8a9d8b. 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/JP92N2460425.