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 0x7062498d5d82fd53edd48e6bd9404323ca63eacd3cdeb8724f64644805150d66. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a295ea2-e43c-41ea-977a-2a2ba06dd3b0.json and https://artists.proofprofile.net/proofs/artist/9a295ea2-e43c-41ea-977a-2a2ba06dd3b0.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 0x537d1c7978eb68c30c5302c60c2a4c85b5cb20b4697a0e2c1fb85c81f0892cda. 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/QZZ7S2487401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd51423eb4652b756a3590535858d27732622d2d58862d633f8ae4a4605a2a0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZZ7S2487402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90df6f909dc8ec6296fef0662b5d3692a9108ce1498a4dc4d93ac691049830ec. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ7Q2453487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1839506b4af19ea10dac965747983ce19db1adc8ad2603dfa0c78f5dcfecef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7S2487403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118dce02ae056c25549d5dbef63eb81cb90ca3f4fac5bc35a7f94285ded26603. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:27Z), 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/QZZ7S2487404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a54f6bdcf1f641e056af6178548ba5a90ffff67b3d72b7adc8842c0e403616. 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/QZZ7S2487405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ec4e8b42d217b9e80ceb2bb07b87d79d0024bccb49e8c62e38e089d94e4b04. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7S2487406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48a7df0af195bf3bffe47c5eb9f5affd7d98b13351e7ad4ccafadd062a98fc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:36Z), 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/QZZ7S2487407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e46b8f2efbc1ba5b12c9f53bc4cff069cf41ce5b76c92c5d0a89e16f5dfe08d. 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/QZK6F2598517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7616e9c27774219c31f41a1665691ae8959da08fab55d0942a58eef4a4b7edc4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6F2598518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50dcf34fb3514dfa3833e62683175d1285ea41151c9dd67618f79eff108000. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6F2598521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd75f8e869ee529969f04b19cd7ee61f4d9e3c818778145a8db28ab2809fd4c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZK6F2598525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4053247143fe187e809d6ed9df530d3e7cf407323a36b9ddedde1f397eeed7. 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/QZWFR2504343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8139673f91f56371bf3174684e33b6d1586c95a4d8b9c0aad7641251fb0db52. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2504344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf386f1b468f5703cfa1acff83ccb74d3f749a98dcbfc0b45a6b5be8c923bc6e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFR2504345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351c0c17cb9638fd6e281ee8a6ffe3a2db51f5169b3550c48f32798ae6c98e5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFR2504346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6da5bceebd75b6d823a98f3e0079b6b8d69c5064b70c74b41000de3d8b6c47. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFR2504347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d838ab7a033352969e7ae609fc2cfef755a9a1bf8773656f70c99c80f3e09ec. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZWFR2504348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc813ab02db6f21aeb6edf825e03d3c259fec29f96dc49f83be3e61577a8cb78b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2504349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36e0261c5a5f8e8880a9a2dc2f20d2986f1a15670e8c17dd1ca084d6fa12d76. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2504350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f55518c1dcca5f0046e4f9b151e9f325b7cdfc892c13582eabd3fa9cdd7f1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFR2504351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8b665ef21f37e4e00f1ca8491e98989480d9f83505a97bbd90989e414b482. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2504352.