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 0xc1fe30c48ff37adb29b58fe4f733652655f02217433455361acef9ed563d9933. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cda4206-04fe-4576-b0e3-fc29a5aacb57.json and https://artists.proofprofile.net/proofs/artist/7cda4206-04fe-4576-b0e3-fc29a5aacb57.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 0xd55e2cdb40195fc4d38ea133380018b3f4348bc79951ccc3c4eaef9cd4bc1487. 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/BXR4G2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe082ff6381b26ba735541d76706e8327c8a486a97114659e6f3d441f53d471. 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/BXKG22301475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0691ec550892f8ce9fcf419098c8a7c5f8300b8fd3b20f8c8a667a026f547227. 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/QZNJX2360081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52af6f19cc9407d87339561e542b5ff80e23b83803cbb4463c3c8179d36cb36. 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/BKM2L2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511744413cef6a3defde2667b9dbf31c87899d4d96dbdd49d2212583cdbc3168. 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/US7VG2332594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724293c8fdc9b8dd639050ecbd9e33b02b75f537fba7d3e7b678309b89e501e. 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/BC6P42200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26a74eebb546c3b93012a460f4705b86ccc171bb8d52c887e381016e5278a0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRBV22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732b6ba386bcdf31d77bd18285510a5c01300ff140526c49f17d4e6515bfa29f. 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/QZW9K2292050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08373d06f6af2067e3552a8b9ffb729e507751e778f9c32c335647cb6dc3d6c. 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/US7VG2259957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b2d215357d2227aeeb111f12916fddf06f734f2127ea183aa6ecae164dc05. 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/BCM612100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bc56d9a6e812a4450568852a09980ffe73ba0b05ce6adf0b17ec665c1da5c1. 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/BCD592100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b83f173029233ddb541e5298e932d4bc3173f8310e2b0fdb38d0dd2d3fe357. 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/BX5UA2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aefa79467c5d24c10d49461f242665f9a7ebf258f946c22e6c75bf0b3ce5f3. 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/BCTQS2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abaf1c4eef5215d2bcd7d9b442c92e90f2e4d09de0059e6ad88ce260c1e209c. 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/BX5CZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8713625ed8ba73b2d7ee3214a1d5b1bf6174041dec721a36bc8f877b7fa80. 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/QZW9K2486013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9c813c56887d55d1859f061246ea09f46c275ace72acde0332a5d7e3733ff. 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/QZNJW2431361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ea1f5a7e1f3b29bb874e50a3502e38c03b7f06438eafb6c62258410d741d82. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJZ2482793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53bae4e15fb5ff839b5b8ac69148decf51d1a9c2127245067e9a109df0d4c4f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9M2318238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d052bbe81055e71f7f6ed47829f472643c717739ac7dc71831cb1478630002. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJZ2482791.
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 0x947f938c316a2d69c906a72748c3f20d8e9169460c7e9708c79a105422fe7b91. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNJZ2482792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fa6932ae8e33595e76187a66d040d5da70859873b88d7b7672a7be6027ea2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNJZ2482794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a452de9ae0636ca3923aadf4dcc2283ab877febda3742dc03702f1cd573bc1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNJZ2482795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6433428474c9170ac2798e294bf1a9267b94f573cbdd24200cb5a70e3b9cc3bc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNJZ2482796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01852d753cb55b4da48925167f7dfe251308b7ac30e3a1f3ace8bf091bfe72f9. 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/BXXB62500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd65d0de08524992611672c996d195c1f2544cf506fb30a5af18d001d569006. 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/QZW9L2457664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017128f3d7380f652a8aa67e943d2d55d7695e922efdfdebb1f54fdebc78b0e. 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/PT2DY2400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561fc70429d914e4dde90504ec6da5525b2df9b564b666514e0a0ef0f5a370d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTVM2441473.