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 0xc82b3ab804f646b14600c8357c93cbf617daee303f82614ad4fdf45e7ac857e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e854e72-652a-409c-b5c2-ddbb98eb06a2.json and https://artists.proofprofile.net/proofs/artist/5e854e72-652a-409c-b5c2-ddbb98eb06a2.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 0xa2f5274228b6e4edfa9f7f2d330d559eac5d5ff6071097163f7cccfff4eed6ca. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:12Z), 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/QZWFM2396400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628d35a472885c30305ce52c3e5b91a6844a21c42184bf6f7f4de22b04f4db2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFP2386773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f24e5799ec285e783c6e883c296d5305967f5e0510cf1ca96f15e1d9b9160. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:56Z), 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/QZWFR2301685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa72496d7bde02783e9f974733cb54090479a572616ec40d98a6b3e6d847bf. 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/QZWFR2301687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbadc624ab3df1d99ea2b223441d9b4f64661f46e2f7c47183153884fa885415. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFR2301688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887976a35207ae2b09f046bf576329d3486ad33ff36f4f7f31d88491ce3c2e7e. 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/QZWFR2301689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8b34be580f8b5248b4e921eca87c63a26676d00630d049a9f1c4ba16014b0. 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/QZWFR2301691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808f79c6dcdd6af810963a900d6f91c86f428cfb8c3521972f09d8774c5e573. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFR2301692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531058848858df50e41aa9140088712bc05b2711991585535b59aae0b54a242c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZFYX2449000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd469790b42eb357e885188b080a4d9b681d3fda98c4e0f63d26ce79cbe607313. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYX2449002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f457c3e7f5e5b63977e2803da02112ddd5d83c0b098db5c055615808af0b50. 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/QZFYX2449003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae049b3a8b9b2093f93f9a26c9ca307411e86ccd672e5cff17ca5d96c43109d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFYX2449004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff355585cd28320bdee47904a03d4b5c6aed2ecc140e01b4c7b8ded7118e8b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYX2449005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a51ab2a9688873fecddb658ddfbc9afa8f227a35a78c2cd25adcc1dd6122ea4. 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/QZFYX2449009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa922962b3360da9adc33d569b295e05c2c64b6e337c812fb50b8d5e0bb2365e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:37Z), 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/QZFYX2449010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67cd3774fc72291b1deee9e885442c7ecab6c259ac5806a710718fa245f165. 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/QZWFR2381086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d93ed60ad639542e56657e4a6215d0a5896865f43365e402daff448f37ff0. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWFR2381087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b99c7dd4f415370c7d5fd6135aa641a98c75469861498a5808dc38a149f7d0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:14Z), 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/QZWFR2381091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2a4d4352c45301e6c1b2ad20ed0ed235cd525b488ff36be065fac586fba68. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZWFR2381092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e82d799521bddcca1552c622dc0385eedd83757655332d1b498ed0ddccd64. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZFYX2489267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28822fef49b7bd1a68f5f93ab90de3319a77225c979fa60092c873b331118032. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFYX2489268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eac7e650babef4235393295d3d6e3f6530e38a3d9ee3b24515f298e4e5c41ca. 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/QZFYX2489273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa3f1fcfc0f14cc9a5d1ce1ebbb52bdacedc7ae48eec42ece131dbecf37ca12. 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/QZFYX2489276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2a2a7cb2ef3fd31454a8e8802414cba28e164c548b57bda380992c5ec07771. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:32Z), 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/QZFYZ2435424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bfe8609e0c2cbd3cf7974515f971b47d1f4b9cdae86c49ae6c24ae9f11479f. 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/QZFYZ2435426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2441a513b0e4f78d931898d9605c0c8d4bd70140bdf0a6a2cc2917a3fd05c350. 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/QZFYZ2435429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8860d2d5511b675ba6f4478e8c8d731b8ff73409e9fa3f66e4819410585bd44. 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/QZFYZ2435430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ac9e8d49097774f65267b5a5afade150ce4ecb3a0c97b88f2e900a5d167e8. 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/QZFYZ2435432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53872b55083a7375589d4ebb52149569620f96b9d624da434d54d479c2556ff. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFYZ2472808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47a1ab2c623e1f9fad90edfc069995353e990cbdc1d34f4e2277faf5b035b7a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFYZ2472809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe391e1f64d79cf22953e28119e64dadf34bcaf41886c281118d61bd031f968d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2472811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f32bf3f868051a3847eab3af948f7f21e1636134a4e84bbdb86491d69edd646. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2472815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5d8ce3c9709a6207bb8deecabaa7363fe25c0fe2013e577faa1a866f1c039e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ42410700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf653077d0f7406169b6f11cc1187fa3b1139d5c5dd28d248968f4d232d0a9a2e. 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/QZFZ62448220.