thumb|200px|A 1951 Berna trolleybus in service in Biel/Bienne in 1979 Berna was a Swiss manufacturer of buses, trolleybuses and trucks, which later also specialized in surface metallurgical treatments
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 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 0x66f1f53b5945069d6b584ce089ddc7dde25787b81811a3160893e1736c0a063d. 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/0ee9c2b7-5052-46b3-bb77-a092077b819f.json and https://artists.proofprofile.net/proofs/artist/0ee9c2b7-5052-46b3-bb77-a092077b819f.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 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 0xb62a14c6ab8a792491048d3b6ecd3e98759651dbb1f2f2c7bf9971c75e7d7446. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US23A1500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20df986f5891011840e86f6b20c62258b26d5a1523a4b4e4f118700328225c11. 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/US23A1501121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf9a9f11145602741a30a8488f661ce3dfa6356375df29a94fce7fd440e8ae. 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/US23A1501195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ed6cde1678b0ed43726836c8793ebe2f2acdd138c092eeaf1709cd7529c9b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US23A1501661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06312c7dbaf354b368288f84f127f826bc357afe97cfd10070951f3e7166ac32. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBMA22069786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d2310e48a45fcf8523234947922136d8401a44da784259b387ed6454dce94. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBLFP2001749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf0bebc844b9f600f92463177a2d2490507083b72e37c9c5345fb2fc54b8d5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBLFP2033048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd817cb157157d88d4fc0c691903255ef916ef3e1fc5e776153732ca694ffcbd1. 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/USUYG1325185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06312c7dbaf354b368288f84f127f826bc357afe97cfd10070951f3e7166ac32. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBMA22069786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7a814976697707514cdbf5090594ef9f62e74c20790ee997243d0e96843ccb. 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/USUYG1335293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296380c4002f08f6ce52abf92160fa75d2d0440f0616123048756636e5db01a4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USUYG1335294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a41d6a092865bec2a3cea59f42ceca186e5effd0a052586657e770037f7274. 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/USUYG1332828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c0788565ce71d3fcfa6db4769254a0917ce52f06005e7a0ca3a43005588b38. 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/GB2GX2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa117cf486763915d95fab833fd282484ed91f4fb535309ac090f7c04a9d3ba3f. 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/USUYG1383124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85611c8d8815897e16613cd5eed709540b82ceadf5f9852cb55dc3beb4232346. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872120343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf3332ebe52d0b987f4c53224636123be193f9d2762228560352a8f80f177d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAGC2268142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc687e51e05d0f325cc9efa5f6f55c5185fbf9db0b29857b7c19df929d2293262. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USUYG1418304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1777e4e1ba7384937d10ca9b648eadc6f3054d4a18d79bf580ea341685d2273. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USUYG1466415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4d8d51d47f6b6ac64dbb5fc850145e6c0f1c58fa8ad9c7d79c5ceb85c7991. 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/USUYG1490637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb24150040b4b65aea89d52a37cff78d750867a0f74cd252a8ca5b82dfb3e61. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USUYG1534045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fec50ad5231bfccf9657a6b54a9e0e52411358dedddc07e903f650f217243e. 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/USUYG1570883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1777e4e1ba7384937d10ca9b648eadc6f3054d4a18d79bf580ea341685d2273. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USUYG1466415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb24150040b4b65aea89d52a37cff78d750867a0f74cd252a8ca5b82dfb3e61. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1534045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6d24a922c5b7197c7c4bc508b44f4709909e12c8134493c019c05099a3cc66. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/USUYG1570889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e24f2d031c63817afd012a978d1108f344793788d3e1b65364af61efceb6b9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USUYG1570890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a30731615af61dc51d8437a65ccf548385534b094ae803439bd0a1c704fbbd. 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/USUYG1378793.
Stretch It (feat. Blanco & Berna) - Remix
Stretch It (feat. Blanco & Berna) [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08504a64ae05a94c1b144d4542847e537059fc5fa52247902c4bf625a521bed1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYE1900772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1522721818ddb5e8c1aa5a0f357ad8eaf2431ebe36774d4f6ee5222b2e0877e1. 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/USUYG1389663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0e0ed97367186fc44973bcdae52488602bbc3e6d2f1b1501d4da258527e5ee. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GX53U2024649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2904107888b7cec4aefcc9cf9fcb62b93020dd257bc967e2471e8659c0b8e411. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GB2DY1900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7886fae118164157e631ba1e16c0f20c79d02a67789f0dadc5a3241b36f014. 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/US23A1500922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b69af6581bb27727313b1fa9f84c4d9782ae762d9536e6816f5076bfb35dd57. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLFP1723077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908701beb37452edb322f6023de357764f0f2373a54fc2bfd22e283faea15849. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEPI82114093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94ed0bc94a742f8a02fa46f4313ca9fc87bd427810394bb7a534751affcd53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SGB502594425.