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 0x90f27296c12c3a2592b90e112cb431ae86e043ec4111edac1ed6791044366a56. 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/e6ab40af-83db-41d9-bca9-1e0d7d1f33a5.json and https://artists.proofprofile.net/proofs/artist/e6ab40af-83db-41d9-bca9-1e0d7d1f33a5.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 0x6d9ced79ae8460e2ea90c244479e902f6c72048bb6e3da82665aa7cadeb37e82. 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/QZ8LD1944239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf63865f196fde8411daf1033b761ee09542b7b89f28d2f3d732b7c1349d3f. 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/QZFYZ1990867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a25d35caf116963cb149c312d058566496fd8b650560736552c4641e92e9a8. 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/QZNWZ2004368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dd1776add52772423e74aadde18481e238b14bd144256d828c85aa44858028. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWR2088485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46310a45ca0ebdc00a05f0b99e9e68f12f216cffc7a66e20c1f8e0f3dc47fa9c. 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/QZNWZ2004372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc88d30c8ba764002a7e1ca4a0f5a87adb54b7c1aabc81345292cb45e168ed9. 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/QZNWZ2004374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a383ae3cdcc906cefc9dcceb43f84aa4ee54380187cdd368ae02a075907f8. 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/QZNWZ2004378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf63865f196fde8411daf1033b761ee09542b7b89f28d2f3d732b7c1349d3f. 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/QZFYZ1990867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650c3a3c818e9c03fc3eca1b49430de5f1307f4b60d36ea83d0918dd890e990. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:21Z), 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/QZK6N2127850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0115f14b5b2850ce7e252b0a649abf15f4e798001685b15e3ff11125bf66dc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES62289693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0351eb1616dd408d06bfbfc5bde98dee7e803077eb9a3e08b79d740f4eda47b. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:00:19Z), 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/QZNWZ2292567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90b7c0dedd58058b2252c01a1806656c79b8c4251ef16f6e8ebcfc66a725fb8. 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/QZNWZ2292570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85ceffb1f050061bc39990ade48c09316c3aaea5734d41db676915eb0160020. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWZ2292572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305199f2bc289911762a86189d8a977fc56b230082891c84831870f9402ed334. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA71993453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2155327e1e1b168383451645a8c915116439f6438d71c04aaa320f202c38fd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:39:34Z), 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/QZTB32473358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1eccc5c4bfea828d0c9f8a30c7f84b892aed0c46fe92bb9bfc65de43307f4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7Q2494819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe664712ad986df6ed2698effa7b90549770e3fc8b9c0dac0e42e24affb5cc6dc. 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/QZDA72549737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efd5eda1011b55588818d7c47e17ad0745ed5223b79a07c8b4bf55a596bc465. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN42556006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9d6eddb53f7f054bd959dde3c8a20ace51615e1489d6639f5c3c5a88ae547f. 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/QZHN42556008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe432645e547276848819a44913bb842dafded4d1979294703d17deb0715e296d. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZHN42556014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2894a5d631b98d6e970f1896700173ef57f2db620fa4e296d3fe63e2dc409. 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/QZWFU2527444.