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 0x0fcff4cf03ca1f715fa9e3e4b1d69f5fec7aa8e2b82ced981e608917464d4ead. 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/0d8ce3b0-13a7-4b8d-9fa8-f32d5054410c.json and https://artists.proofprofile.net/proofs/artist/0d8ce3b0-13a7-4b8d-9fa8-f32d5054410c.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 0xa430606a7cb60ae9c354d322bc360a2161174d4ded72d48be6757734ffb33ae4. 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/QZFZ32575554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaf13b850a49cde8c7331f3157df595afbae94855ea1126b40b2123c3115bd6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZZ7X2464415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ca7d767135e63f6821c954c683881389a01cd6ff5bf2f13919d1442b233a20. 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/QZZ7K2497078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a9743bb5d1b4280581a181aedfbf2d89b65358f09011b7cf83964ded4ce8f. 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/QZTVM2467317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83468df84c9770e2887f25e4dc756d4064ccdcc13ccb0392b68964dab703a7. 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/QZTBF2422785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54298987208ac3ecfe1ae239f73ecf9e673c6e3f8ee17cb09b7735e728bd08a7. 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/QZTAW2437206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b284079c4dcdbdcb921e7f3e6733fe10b0b1508dc6091442ba82ed38e763c2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMER2480633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05c937a86fb2e0cb876ad649df4fbfe7cb8253d0da836bc8a3c56ed43a207f. 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/QZHN42494192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726e4df5fe113f3498640f6939b61988ff71d319e8df9ceaa8c810f5972817c. 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/QZFZ72460588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf926f555df5fb59528fffc211ef94bba8716b191b353f572d472817e5d14fd37. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFN2387681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c94229394086d5ff43b32e1a6d1c3de92a63e29b9c1b6b2f57a70aa2897fe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB62329950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aa6ac1da0fce501fccf1119e1d0d58e728b7776ba1492a0f424fbf544bf573. 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/QZNWY2316251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a74f6903a609e29489e9c3a844b2cc701bb66896f8590d13d2fc37df7b6650. 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/QZNWS2352255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ff50341ca6bc40057b07479d8fd145d30fb2bd44b2abb9076a61f33cbd8096. 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/QZNWR2388443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d5f9a07af16fe498dfdf81a5e6844694717f734afbc63744882cb57850ce82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6G2324318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfb2366ff63a9792faf4f11640ae4f08b1b4a26ea4e6ec7fd203fee025ee1b. 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/QZK6M2399067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a036b815e425f251af0b61aa799bcc5c1bf62d2745d823cbccda45c5974b6. 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/QZFYX2311935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957111e47634478279aae019203787b86e64f2774af0c27c774a6845faa95d1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZFYX2311933.
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 0x024864a007b53e33cda8c8f089791aa8d12138a64c12239ad791f2e0851dc4e7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFYX2311934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0f33fb31a6222c0202f134698cb5e62cd6a797ced9b8a9f2c4c18858dbc29. 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/QZNWY2212841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ebaef5e060189c413ed54c6af2c3f15279b98d47f24b964ce37b246a35b61. 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/QZNWQ2204477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5c4d1bcb2bcc93e5ee22ed735d2df3d20cfda73fef012b2eae3b2b3e378ca3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEN2262959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83beb78c5bcf8c2c483e13599020713045e3cd3b82cce1cba5004776decc94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2278455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2dcb29bad8939b62da669fe9d9dc8d494dbbb1a38e65b296028006723e25a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2394466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe642fd7b1989b31426ae123e771f5afa66cc063b5d6e21e1430f5ad57ff9d7d. 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/QZTAS2394467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397be4c139c41ae6c7f711e1f3bcc037c6d3eca702ad565729c342e166e01d3b. 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/QZTAS2394468.