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 0x902cb817dae29841646e264c60cdabd20c631732777462f49da0ffefab150886. 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/a1b146de-bcbb-4412-877b-f79d2ee6534b.json and https://artists.proofprofile.net/proofs/artist/a1b146de-bcbb-4412-877b-f79d2ee6534b.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 0x211a855b0d4f40c45bd0685fdbea837eadd6f25ad6836aae5530951068c8511c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFE2455968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993516c39fe645b6787a0ab5e678dd3fc36189d61d95eae5e1309b027b53a4e. 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/QZWFM2484302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2b89dceddd24f796ec5390475ffbb1c99478324907a4be2c3f12798cf3810. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFM2499013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b59394319c44317f0112c52bbf44cef03ce825aa968f9dfbbf999f6be5c787. 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/QZZ792466692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cdc849487450df812b9af6e2c38b3657c8ac46c64003fa91529170fd6c74db. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:38Z), 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/QZZ792466693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc512f5b46540616eb36d568854d41e9e29e6ac45ee6c67ed3f2d31ba28f6244. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZZ792466694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd8a28c0bae5015f445c3800f6a1d2b4123feea12039bd15a3340c3bf131b3. 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/QZZ792466695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2189b7b0695002835bdd4061215e8ee17d65a635bac6f5afa9795342e1612. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:48Z), 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/QZZ792466696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b4a3af5ff2a4e790c4d389f91eeca721823edf0c10aefc77881e62213124e4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:17Z), 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/QZZ792466699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48254ee292c48b7b35574edf1786e67259f36e64a27254433832951daad6e17f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:06:25Z), 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/QZZ7Q2418937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b4ec018efe7a4563b4cfc1fe8af767f4db08f0a9040b4c622fd0f26c97a30c. 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/QZZ7U2419010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb00e3732f9d97840571c2b8cab4f82ad9912be151044b4607b4c6ccc0526d5. 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/QT3EY2462321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77807d81f03f4eed48f13da7cf947921282db7d873281630daebaa98fa4ad4ee. 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/QZFYZ2518231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee8ffd520f2bf5e8ec9043ebccde104d26a7d619d854da1b714ec6af0012c2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFYZ2518233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0b87edc6440dff736a374d1a6438aecb480c6618e68c8dec8e5f3455af4c77. 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/QZFYZ2518234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2e60b8742f8d058598513336a669ca48be122a83367a0c83c1cf5edaad4d6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:49Z), 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/QZFYZ2518235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dcf60fd16566989fad07ef64027f390557fa85a77946df824710f565749f9c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2518237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d3aca9f8be434e0da8deba34134b3ceb7121074b375a53eaff0e58859ea803. 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/QZFYZ2518238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9db1cf3d52bcb368097ab2e81af1e72883e6b87c88c6bf74878217e0a71463. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ72524462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dca78bd9abbdd7ffa92ec1100c7a38dee1a5c00f4e7e113fb2b452176d3d25c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ72524463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd29576c1621832a47c82cb026536ed00a53f21b4d73538b70b43f223d973cb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:23Z), 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/QZFZ72524465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b76aa65f29cae122da71b89570c551daf1b778718c34f5c8bea7c1057c5ee90. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:41:11Z), 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/QZFZ72524466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a9cdb1c9cad88d3d047c6188575a116a45877f087b23efc89958daac07364. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZFZ72524467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67988518dac33c79d0cbf3486e10fff0fc6bacd1655ca689337627fcd89887a. 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/QZFZ72524470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483bc42726b0385c3e777c35974a10fdf8509d8eb79cb55f1f0fb7ee333ad8be. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES62558736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a36c4bfae1c8073043108a3f9ddf0f98e634f689b0ee03830701565a0afa586. 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/QZES72597897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde62a3aebee5b6b2ff5c8b2ad73038c77ceab000179bd0248722d19588aa1f89. 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/QZES92563509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb953d9dd7ef9b43bbd4f91d1349db9f89a287af58326490a1f0ddc15ed9f98. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:38Z), 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/QZES92563510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce51ca3ee87897438b72413b08d4aa588b532e30ae9b545ab1f8e3cac6a14657. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:47Z), 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/QZES92563511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e736746b5f0b6e18a3dad6530250911309ba4776968fea6faa8ab41235fa267. 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/QZES92563515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe03a02d1a893a2d66a1b51fc4d796726475ee1435801026369cf3f15cac6df. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:42:29Z), 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/QZES92563517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2471e221cf19b1786db34bbdd341f1ad125e222fc5e81e77692952ee84b819b. 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/QZES92563518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd7ee9d965675b1fd4bd850853f7e48cdbdb4ef891aec0f8047f41f3f93d23a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6P2537686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0612c741b938c08e421204e33c4058e05cfc9d378faf21d48f0ea10cc0403e5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:00Z), 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/QZK6P2537688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28bd77f86203861d3bb66fe8b404dc4ce05ac091db0ca0d45f2fef89c0bd5d0. 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/QZK6P2537697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c8083517567b76501e1a62ba4c3573518ee350a70b9fb18f5d3d4545483fc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2537700.