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 0xe58b970aab8af99f09cb55274020c1f544c8a12bbb6bef3b36978e90fff41cac. 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/b9bb93b8-2a81-4945-8eff-1cf239361b4d.json and https://artists.proofprofile.net/proofs/artist/b9bb93b8-2a81-4945-8eff-1cf239361b4d.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 0xf37e43ce2a059394786dbd3d771e31a4d487b657952a0661cc65dbee767e9f65. 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/JPPC00802019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483316aa93b8487294a047783a6b0cf9a323ed60bdaed53b8191b7c9e2fbe574. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPPC00802099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5e386080fbbdfd1fd632bd2ebd6959b9b7adfe9970bf087cdfdb3c49c1a7d. 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/JPPC00901079.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd67697f830c01a44ba77b3578d57a35d3cf5d5cc3c1ceb49cdbf3b67a63671. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPPC00901081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483316aa93b8487294a047783a6b0cf9a323ed60bdaed53b8191b7c9e2fbe574. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPPC00802099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf39f2e18870ecdd4aed48cd9ebfc2365a8d2383266222c0129c001d4a9e057. 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/TCJPG1860667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed927e3e02625dc3bdcbc50cbb462f45901205f01db7d8382c5a784f096a8fae. 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/TCJPG1860690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e226733b1fde14e5a29c7d45c45d4c555a89c8ce9e97bc6680d29dbec5468b9. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:26:50Z), 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/USCGH2020019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d469136971a60d2c6277b139ce6f2d0693a97cbeeb8e13cd79ad7840c17f982. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM82084267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb19326dcc4645cb741160ebac79180cc965fd0f7ddc4003be0613ecb56a63c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82084268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560366f3daf96e3016618dd3751c91e2a3a6d6a153df766c3a59d36da9db2545. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82084269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a46c4125ff38aa3f54a3b9f83e03e3bd8a0078d27bc2944311e31246ce831cc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM82084270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3438b88948991c80a0d3362cca68181204342df83e4bf5bd822156a506f81e28. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USHM82084271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586e6605214d382d73c59d09327b879fc64caf123ac69b9d9991225be09cf06a. 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/USHM82084272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa874fc7f9059a0cd93f75b9a0876a4b67a74e3368a6afe35a971a4c3f2fa1777. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM82084273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dbe45a3966264441f1b8f814b7edf46e384570a6f415376ffeb3370b164bef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPS801962715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74bf9b55b908d82e4a6a9004aee3e0bab0c0a3816fb8779155e72ee0eb109da. 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/JP92N2433029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32066335ecc843f83bffb4a5b46531ea6fac5fbdea6681394bdf0e670130c60. 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/JPPO00991280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca2c0f01efcaea7ca885d68971b349338e2650aaaf586c03318ff52090d6a58. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPX972314013.
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 0xca42c75567e353b2a80b39fba17144f7bba45eb96e4a0599b8d88e5f5f305cdd. 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/JPN100900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca15897274319b40736f00cbcc1b605bdafb2e16893e751663bfa44ae24feb39. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPWP00700653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d980511b7488f9d02135e4f01bc3d46d19c44e71d5cb102f079297428711a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPKS01002302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230028e4acd04511db1d1615e0ad92d95fc68437aac18b3cb891178dae3539ab. 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/JPKS00902002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fe7810698db077048a67cf52b146adef89b6fb3f00038313fcca64217e7bf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPB602177915.