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 0x642be80e567badbf1107d35734ee86153dc923c346ef15d8a14d728aa55c137f. 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/9824e28a-edef-4d84-abe1-cb965adab69c.json and https://artists.proofprofile.net/proofs/artist/9824e28a-edef-4d84-abe1-cb965adab69c.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 0xaca1baa6d02f516e258e88ecf83b93faf29a7a883ce170416e4f74167a95a91d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:27Z), 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/QZDQH2302809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b40051d900e4008e8646077b21e0b879e03d4612f1cf1d7d00d0025da0bb1e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDQH2302824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055a4343ee757aae3f23f1ff9df174361b2acc90398fb6adfe8dd7b4b6dfd2c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2302886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1022e495cecb1916c616ab87d71006c462a99df21919b95b3b6419c50d57312. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZDQH2302903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625f84f89cf8fc6a03124a4213e2cd2855fc0187e4bae8565b35a42e3c20af3. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDQH2305531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26076425baeb547d43125d94048bc1022889d9888b29bef99c232e3cf1d58f83. 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/QZDQH2305532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595103221a97ff51de9d497463196a5bc75adb0e7e0e1c0a368c2d5c8dbf3ab. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:41:07Z), 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/QZDQH2305533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d2643c6e32322fe4e0198b2e8aa7b29494d3699552637b42ab3b86b183b45. 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/QZDQH2305534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0d1257e3c3e939c5e045028bbfdad8247245c2c81025d9bd654452e66ca37. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:49Z), 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/QZDQH2305535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f924fe2bb04ffa72dd025b3aadd1580c00c5ec6537f6aafb9504fd696253f09. 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/QZDQH2305536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dfd5c96784ac62ec20bf8dcafabe8acb4dd9b69238556d1b50e8f009d5cbbf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:27Z), 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/QZDQH2305537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db3d8f4736124870e2bdcaaf36ec02fb8999a7754b12d365c7c08cda5b0d7e0. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZDQH2305538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2564ae3c2b6af819e18d122de3c5801dcb13a40331e44378c47e7dab9851ffd. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:38Z), 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/QZDQH2305539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb42eb136edb2066ba37b1cf5fa24d3fc01b50efd711e9119f96bad08e6a74e2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:44Z), 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/QZDQH2305540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62d66fce3ba28ed6e3090b12a4c27ea8ef5a3f4c8ddfef002035ed7ddd0cefb. 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/QZDQH2305541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ede8a63cfecc148403c4d50f13bfd580e90a14aa976f2a5589df0e7fb8c57. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:08Z), 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/QZDQH2305542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd783afdaf058ee53444ad80ee06ffd32b01a1528bed640da1d3303ff1cfbce13. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZDQH2305543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f4967c2dcc480a9a866097c2dbcbb6252d4e2129a98a684ad430462c5fa47. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZDQH2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dade82bd3c7214a96cd4f305531013dca7c3d8978aa5b2ef9efe12d5ef9289d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDQH2400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac96219cf5f71a08e91f05d75883f3044bc15566ec577325f4a2354ec0490aa. 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/QZDQH2400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bcc75bab9c37c2be974be175398a6be155dba4d01223bc94332a719b200293. 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/QZDQH2400642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba7ed95bf84a1ac6721e5634ae46fc86aa372699228dcdb15ecd63b693a86d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:47Z), 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/QZDQH2521224.