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 0xf31bf6fc80d75359876d95961f413ec63f3f434769bf90c8de9e2b1e3fc8bb2a. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b9b0457-beae-424e-bbff-68840f92c0c3.json and https://artists.proofprofile.net/proofs/artist/9b9b0457-beae-424e-bbff-68840f92c0c3.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 0x42c39f1042463b3bb52106d483c94b09700e8e8692157ee377e8e6ded622011d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ511000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3a7d436377d7289f25e5ac3b46b2946d39195e39dbf169270e0766f6b8772. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ510900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7d47189df0484fd5cffd7b81fd61f8643bd78f7c824373386730e70b324e71. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ510900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b39855f9f44f11a5d99ea85bf1c2df375ab71c92fb4041c7f17447a3fd05cd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ510900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210660ab38903183789b8a792396fe252c56cb02381334bdd9148fcb09fb2b5d. 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/FRZ510700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd51dadb8ff569bebfa80f38299a1410eb5a0777115915bf432a8a04b490e4e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRZ510700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df7c731624caf8495586c8bce432ac19b15be48b3b4615ec5c55d996a47783. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRZ510700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcaf2e91cf2eea068419bd44ff5608c53777af573aa9596ff059e709479a2d5. 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/FRZ510700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41377eb8e10f04ae7a140d61b73fc97e111bf6272f970f1741198160eb963fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ510500018.
Hymnes et chants des supporters du XV de France - Sélection Officielle Rugby 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c98b1764c44ae9561aad2f8567bec987dc5996a0905dcdb1148755c6dd839. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ518900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa1ade63e3a51d3f60da1e0bd826e4e94a19a7603f73eb5691595ee5cd6d56. 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/FRZ510000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509d50719411dcab6445e1b6c30a0095f1b82baec33ce0453f3bb495c792b7e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FRZ519900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9674512a5bb96117efff2d5e91ea37d0e35127b383a435ff9e112da9a5b198e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRZ519800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d6a5d56a41e9e604e951af6d1ec6225c19725346c85c8d43ec4e989bd09d88. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRZ510000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e24cb4479aa8f8962653113673db21f9b8b8b10b09c111aa042d62f5d0cbbc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRZ511000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc13c8e422f9491161a51deaf79241e91cc6ea1ac086d7af1f64fde76a95138d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRZ518700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93a026c4153ddfe3cdcfa42454cb1426beec87053ff0af3734cf889f55115f. 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/FRZ510300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22df923796c7b35d04d5310d50f8817122e58f97c69d06fac13ea245af1a33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ510500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494b22cb17983ae8776cc6fb542446e3848e66fd6817db28d37f461fbd406db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ519900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1327f3fda1e89a4e46faa68a1d8799cb9e4bde5d803c1e1b5b65e3be3afd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ510800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d1327f3fda1e89a4e46faa68a1d8799cb9e4bde5d803c1e1b5b65e3be3afd6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ510800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b263dc0a6f11ae8950a750b25fec83b9ee0fcd3b6158576842b809835f4020e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRZ519800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cec5c5065abc66db5050f75803f80c8c8aa25f476bb5a00f6f91d6ada13ebc. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRZ510800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93a026c4153ddfe3cdcfa42454cb1426beec87053ff0af3734cf889f55115f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ510300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f6ea1f4efaae3119fc0777cae4215302c1b9efa5281934e8dacc76c540c0b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRZ511900100.
Aupa Pilota - XVIèmes Championnats du Monde de Pelote Basque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce45dc9d3b1bed98eca2235fbd733c57681cee83451552ad93861c3371d28955. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRZ511000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2956bcaa1b1616a3581f31a1fe90976466a1fd55cfa45a37b7b4c65e7b79040. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ511000307.
Les Bleus Supporters Anthems & Chants - The Official Selection - Rugby 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28eadeb8aa0ce33c8649fad74308fdf8692ec58d8ed3fc24a34b5eace2ba44. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRZ518900017.