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 0xe9f58083f59f75c6ba35fdcf15477f61abb8f6103f2a226ce971ff2a98b0ce81. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00c3b4c1-7ef1-4a38-af2f-4c187dafc8a6.json and https://artists.proofprofile.net/proofs/artist/00c3b4c1-7ef1-4a38-af2f-4c187dafc8a6.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 0x7afe9759b012ee9b34d341d9c68e32ac5d578200a5f549cca23f8ab7bf98ae23. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES5301150480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92f0f7cc52d87546a337b3bdca43278c6bad52f80909a64510fd732b28ed417. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES5301150481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d93db7c7109543ab644fc331c81c0c2b7a5a28087c9be36c2ae37176eeb37. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES5301150487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c017960aa3d10deb47505931c57114f5cf7988608629367e5c447fd6574ecd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5301150488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e427e488e98661af2a3fb10c801e4fd0a6248e82c429823b3c6370f3811ff45. 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/ES5301150492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9367a604867b666889abbabe67583371a23b42b91569fc562e6ce9735602635. 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/ES5301150493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebd53ff7550c90fe02ff8a1a4d9709c6a7c44793b7ec0a1afe2709d7d0f8f44. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ES69S1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b236de6f8fed43f5f8cf905c5ad9dc26e0815ad9ae9460ec99fc9ad2295ea4. 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/ES69S1500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f16a1ab4e7f16ba35467f7e71b908a87d8b1a31a751c92846d7867fec0989e. 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/ES69S1500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915c94eb7bd23bb9fc189f5e5d0072c029158a43c675a324d256b45c05a7d10. 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/ES69S1500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5db360db2bd21d22ab5c6360d7ef90d454c311fa51cad2e479c00832c6ed98. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES69S1500332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc6d3838587b2e6b42879d29669ada655b441b44373c3a5dff96eb0830ae68f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ES69S1500385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b4bf34960bf67dd44b02e600da715c9afd75e32fa1c040f7f7eb4d12081f6. 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/ES69S1500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978763cdcd83cda513b05b9af5113b491720aa1c9ef456c3022043b1d3e2939. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ES69S1500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1db6d15b6d075b9f958df86fb295d308e5939b7fdb1d77a885f0a3f4e36aa78. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:33:30Z), 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/ES69S1500542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fd29578cbbbd15d0e961473f79f468c06f86cbec85bd0effaf5892590c5213. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:59Z), 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/ES69S1500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4bd7d31e3be11ff1d2955f15fe604a911187454f8a7072c2573f023ce0af9. 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/ES69S1500552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d70e34fd14e222811ab157701d017b199965a5679300e4ed841e7692a75776. 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/ES69S1500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004a9638114d77abf7a9dd82321ffa6ce1bac2c530493af3ea217ae91cbc288. 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/ES69S1500569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d70e34fd14e222811ab157701d017b199965a5679300e4ed841e7692a75776. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES69S1500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72ed15199ca5bb7b5b10fd81de37a7ad040c96e2411b12716d8cc13330bb86f. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/ES69S1500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e658262dd316f48b513b08114709af083320cdc5ccc5aa4749691be0679c6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES69S1500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23360585254ffd0283f001d2e7b238b5e6938373c38ca25c219b6f446d46512a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ES69S1500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5487dc2686063cdd8f785930bb34463c768aefec6280e66536265b21d573db. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES69S1500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75e88afa526c69d8641296a094ac9cb10f866507f7c9e85c8b363f8cf560e4. 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/ES69S1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565d50309d133eb5f064ad0cf0b7392a55478fad5abb69f2f7d9993dfda2033. 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/ES69S1500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084667783f48b9014a0aa5c8ac45aa229452b7d22ada8ca7ad94fad40c5931ee. 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/ES69S1500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90e7422e7eacc587b4a108b940e9e57b426ed44282677fc0a95a5e9a62f762. 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/ES69S1500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87304c8a52c28e74b3e3dd51a3bbbdc9a4ffa015079354e1a501d436e841d544. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5301027310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d60db183d05ff683c7aa048a91fa6b4af552bb112de7d3ae23ef0ed1f31e2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES69S1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e523d45b985598b3dfbe41ad6491523cf48cdff2b0d7ebbc68e49cff73a1486. 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/ES5301150592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8f5fa075fea64e36b44d45918338de4f2655ca86ae0f86094c9a72bee09a7d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5301150594.