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 0x56ac933f7d6afcb50deda7fe4e14ebf98b92d51769a787f76f0231220da5d637. 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/818c1dd8-23d8-4177-a379-62df0f54cecc.json and https://artists.proofprofile.net/proofs/artist/818c1dd8-23d8-4177-a379-62df0f54cecc.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 0x0b9ca602c31b357b820e4c60ad1620f62d0460091a243d57b4128bf592295007. 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/PLP731500001.
Nocny Kochanek Przystanek Woodstock Live 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f23cd5428c97494e429506dc3b39231e891753f112a7440c398af74caa64895. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLP731800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d36d514dc1bee31bac1428c9bcc6360f924ffb18092bc5eeb0d5589afe5557. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLP731800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3af24d8de1a53fff6c43c2d2c3f9900fc792bd9e67b9ea3ab9af37859d1e75. 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/PLP731800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8b948399d2fb5f114564f51fbc2eec87a6f6f14c3b3a2566e0d8d9974f08ff. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:33Z), 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/PLP731800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5634c21e206753d5f71bf5059e378d40d5a5198e8fcbaaaf3ff5db590c914e12. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:35:59Z), 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/PLP731800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf34b3a594c0030266d3828c5a6b9c9a090bd0dc9eea71789387fa6765725f64. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:57:02Z), 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/PLP731800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ff0521f24557b9d5d16ea57d3951749522a080037a251dd3ffc62a59c0b084. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLP731800021.
Nocny Kochanek (Live Pol'and'Rock Festiwal 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06c1f8409c3928ac0439a659674cefb63a03451ec7cf34806340046167238d7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLT521900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beb9941db20c8965d4c5bbf6c632ca2ebd41d9faee7b763f9fe465db678ace8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLT521900005.
Nocny Kochanek (Pol'and'Rock Festiwal Live 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32d98dc16b200514cc8d0a1155e53b846a722917b1000d7d6f6bbb27d5f3bb3. 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/PLP732000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4546331663cd9edee6305dfb5d69a7edf76d12eba908956b7ae87a84f7c344e0. 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/PLP732000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98efb788fca74a41d74ec6db0a7620d1ad3b226460fda105773240696fb7d057. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLP732000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0333588c55c2ac9bf092ab567cea079b63456185a6a70cbbac36abca992ed0ff. 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/PLP732000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3ac533a2f98c0865ab0185cc78d47dda0da783362e2161986fa84aadebdf0. 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/PLP732000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651892f722b502d0d113283399c175ac997850b402ff46c787e09724209bbf4f. 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/PLP732000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ebf0a12a0b6cf3bf60cc527e1382316b0271964a548e5d2f35649b4eedbec1. 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/PLP732000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96918148534492b1c54a79ef8bb6ffc90048348fff286a98e082ae07ddc2547c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:58Z), 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/PLP732000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaec657eb36a4c53f481e240239f86f7749fd85356f4b6d5e55ed927e81b59c. 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/PLP732000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9168f2aec30d89409c0ed81a8c1dd938f0d0aa2bac3a16c3123ada292cb48c4. 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/PLP732000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a796ee78dbfa13bf72252964432036ccdb433dd54b3f330fef93f5e25c1d9c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLP732100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ca8df70ec3010412936191fc83a360d77186e8943b4b85f03a8716667b6a8a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:18:48Z), 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/PLP732100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a9aed7e10031f3a72b58596f38b24f7c105d97c07f3299e6b0474800fbfc57. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/PLP732100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f1c0966272d5f58e3f553efa3170a14a74d989c961c0dd414228a18f1a2ee. 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/PLP732200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82136829740441f31938cc5f88ccd15eb5ec94ea8401712b32b01803bc5f234e. 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/PLP732200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226beb0dbe1748bb5063dac5d695294e69fd0daa0758c7ddd6c7da96394399ac. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PLP732200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a217be6d1fca3e433ad8dcf8e654dc340336209e8edd8934a5cce4607bda326. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLG961810003.