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 0x7a9e378796e97e9fac7fdb3626b0cc71c82a5f5ad705bab7fc54ac17c54a1cd8. 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/834ddfc8-e366-4ce0-ae52-18067ffacda4.json and https://artists.proofprofile.net/proofs/artist/834ddfc8-e366-4ce0-ae52-18067ffacda4.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 0x4b4d4aa9f045ebf1adc0fd12a988b4874fadc5b17e33b4f90cc650a05eee770e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:38Z), 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/QZNWT2204281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa480f64f1b1cbcd826c41c6b5b39bcd756a7a5f0195d8f14651cc1a869cd03a5. 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/QZNWV2283043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4a29da5d7781a9d4f8bd17b7155ac275863d3594f1c35ed92c8d0e83f24945. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFQ2393816.
Eskailera Hastear (Txantxarreka Gaztetxea X.urteurrena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb42180d750c86c1b482c215ab662f685d607ad6dd9f1c8f8d3b0b2a4bf65a1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2419863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f4fdda84ab5b455fdc5a7526e8aeedfbd6419d5c824604a46c0b978320f5b. 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/QZTBA2461698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6fa2ee06931aca0ed072d90f329a875c09293a1990883cb798ed55d1f36d5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBA2461700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2736226b9b64201295fe3eb04becff63b65d3db4fa8329b6d8d29695f0af70. 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/QT3F22453209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4777ed31e49c28957b118eaedaa0a737e6cea08b2dc81aef9e9bd160e8e6ea18. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F22453210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dffa4e1a242fbb2b5c70032380da6d33c3db76836cb05c689477428a4ba690. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3F22453212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232662658932a15604952ef6fa6222649d6c7e33076366c1fcf561f40fbc66b. 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/QT3F22453213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ccb0a97106c15a6e7a6b3ab19e22bb337f04aceec9b261252c4e81e9a2bd7a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3F22453214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c682a0362c6eaf7c91f3a17dbe9e322de7a38995e861aaa47afc5368cc67e. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QT3F22453215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bbd537def030045e0acf9e4cb8e96efb5e96a80131990920e8637b7d5f6ec1. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QT3F22453216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b686827ea4a974c9e36ae0f6f5a8d16da19d0908de7a1ca4d06b06e3d09cb7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEQ2588775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7926198ac3a731228a077dc3c81ded1001ed71a5017dcb0d7f4dbc1e4e9afd6f. 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/QZZ7K2519304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdb470125f6c051ea50122054cff96e54bdd8bb74477b090d2ca725b2599ce0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES21A2400056.