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 0x7a2b794e36e3d49329fd1151c9e0cce8ecc3d5239c441f51e3b7f5395f80443e. 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/cfb56ec3-c013-495c-9151-e3b57f3c28b2.json and https://artists.proofprofile.net/proofs/artist/cfb56ec3-c013-495c-9151-e3b57f3c28b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'orizzonte Degli Eventi (Remaster 2017)
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 0x25133203236f41b673e40ebd4d8100df95ffdb8b79497a78dba1d0f8e3089d16. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZES81825918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e956508c543f70683d638ebe5a3a45e72d32ed205ce5eef122851698bbb6292. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:50Z), 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/QZES81825919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d9641b05a177e07965836a39b3d265cf9afa7b265bd8c9a2d1d6ffbd2e1eb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:29Z), 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/QZES81825923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31546b54773d4e149a52440a468e89f8ac3c4764477ba66a51a137748916d8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:14Z), 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/QZES81825924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b84d2f98abed63420fcaed3dd5dcdb893734796ccc6519140e26eeec238033. 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/QZES62128081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b1810bde5c5e6361fabf23db264ceb3211d01a05458d60182704d29da6a96f. 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/QZES62128087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b89c971eca92c2db6ea7ecefecdd7c44253ef5d2f23b642f9b338f11e0e73ec. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:47Z), 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/QZHN62336430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac5a798e19435dd1ec662ee5b3319d1a4be0bfc53e2812e429531ed8bd47e9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:46:41Z), 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/QZHN62336434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c782df2fcf74d5171e239b739009e5da9aff8c5bee6c47b7370174ac3cf3f66. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT3F22478856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f31155019d1d701a6a38922bbb81fbf16f38894e67e8acef55f32df522b0fb9. 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/QT3F22478857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcd9f8820fb48c9f5845d78b7d25091ead23461a10e8623816abfb5ac2be7b. 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/QT3F22478858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944b0148e4c9dfbfb7754d86d8d07965058173b946cd29eae162bb045adc0aa. 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/QT3F22478859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8b254b8c950a28f3d87f70215e390158c94226b35f1d34b976f58fe036aec. 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/QZZ782474870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ea4cb92e8d1c1c10f8597c090eb46d01546ffa51fd624d2c209834d9333921. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ782474871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b54177235c67885de4f43240dba9754116e28f7e93ebcf7dfce7f0c7633496. 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/QT3F22478860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a039a1593f301b22c4f36d47cbc6cc8c7122c95ce5e986593facaed51dd5925. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F22478861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce3f75f984da7f8af8729cbb26f3509d1f9b0896239c54036ebfb98083e843b. 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/QT3F22478862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5dedc27f91176d5457be16344140811f775c3c2f0352256c008a8a77a1ea8. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QT3F22478863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df64949635c74f4cd359c9d11f5192e0984031b8fd9986df59c6456fb4fa3d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:42:05Z), 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/QT3F22478864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca65df7e303e3b1a784499e4a1343f0d45ad3b401ec30f259ef5bf79440f59. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:38Z), 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/QT3F22478865.