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 0x5f0399eb9f01b809ea41c49c1ed71134f031bd2c3b73418acfff4b73588acbf2. 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/046a9a88-c883-40c9-aa4e-19e6c81896a7.json and https://artists.proofprofile.net/proofs/artist/046a9a88-c883-40c9-aa4e-19e6c81896a7.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 0xbe55dd24a68110ead5a9bcec6a3fcadce89580a4eb0822673589c88ad4f56f9c. 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/USA371018230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11bbe516a50f90d4c9f167f1672550e38dec7ca31dbac4bf20f7d8d51260fb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ES71G2504554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a3a0ea36cbc9087f47f4f9bf7b525c569761741aacd689a037d8c5bd4963e. 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/ES71G2504562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e12c36e46a7502a89999f2db88fd26842b219d6a25dde9734ccf78eba5efa1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ES71G2504558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89c682f222f39c4bcefcc26d2988c4447c3d7ac3470e19d87ad90bdca490de8. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ES71G2504557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c9b6f433f6b990686076e8f4df3b08acaafb08d40330354b920fe9c4953d3f. 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/ES71G2504559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f3bab63a8cee2ce270a7d227c16fddd61992afecb021925c7f19c2dc1141c4. 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/ES71G2504561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4892dcc17c996e06d06c9e133d2bc069369b2f7b447c5e2c0e4d868f9cf53d5. 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/ES71G2504563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f541df74672dc528397e326d6ea4feedd8d21222fbfd02590e7fba26945b8b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ES71G2504564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4a06b5869d50000eb4e16e1c79211847c620a6e03b7eaf84dbff72f77b22f. 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/ES6111068301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81726fc7488f947f8014ee9433c133043571fe6b681a612a2f522fa6b1b16ff2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES6111068302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cee5bb0fbef8f13db53af8dd426714073aeacc9d89eb648e3a00ba5582a8bd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES6111068303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c29c62ca6d8439e3e804fae41ec865a4f997928c81a72c88200a6d3713c2250. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ES6111068306.
Itsasontzi Zahar Eta Dohatsuaren Lema Eroa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2eeb157ecde93136d5a0276d776a29fbc6cf6e3bc63576a344be85d7449f30e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/ES6111068307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fbb5a734e4d2734506998895b5e76fd28fc6c260c66ba1b0b2c170d05546ca. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ES6111068308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf161c634c15ceafbbb349d4a71449e7519933629c7935829c9d7eaa8b889876a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ES6111068310.
Vehementes Torrentes de Secano y el Porque del Zartako en los Anales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fa08de260f2b46ccfcbac8484531b724a75f52bd43ecbc6a8afb5c843b7eb5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES6111068311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61805fc8c13084a7eaea9836065745d8ceed804a5287dee02f3cee76a0b4ee15. 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/ES21A1200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333b04f02230978e1521eb31aff8787cd6301ffcd2da7a836b49370777c1a4fa. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ES21A1200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476294936414effa81867c43e63a59343dd6eb32950b0bb05569129856d12b6a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES21A1200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38231122eff3dafef682e30f3307686f446562a2bae156cf5e5f9351ec0ee1ae. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES21A1200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f5af56b7050720bc53161e9ab3d398fd949ebe7c71361911d488448665949. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/ES21A1200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425804ccfc5124502b49403cfba0a95fa1d806adfff82d28299f7a0c2faf866. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES21A1200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f2828662b48f37740e28d667441cee0f0a8ed28718d5dc6e0bed7387402a83. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ES21A1200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c27d93f0e35634c38bee545e3200071676eac7f9de4d5e25e389b576968383. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ES71G2428489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da10decc59fe5b9ccc3a28017b6b8776e5c4c0342301e485fb3a3076086b98a. 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/USA371018224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b7069a84e3532fdaa29d5387f6ac7464e541ad39e53a50e356337a73a405f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA371018225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbefe60d2fe832c0d281827a8fd02119463d87e943efd029536699f992bfa18. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USA371018226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fbf3ca3d150ad3406257e8dfc082f22976b196bfff3f4505b7df705723568b. 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/USA371018227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2d08bb87b4df5b5a5d1055ff5da3abfba6b01f3c652a18e3239b86b65396e6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA371018228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9743b68fef71f9422046f31c2a2d61d548336b9dfe909647322a381f54036f. 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/USA371018229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55dd24a68110ead5a9bcec6a3fcadce89580a4eb0822673589c88ad4f56f9c. 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/USA371018230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0489e47956dbfb200760f7b8f22f211e9dfed3d7f95900909818167c55c80ca. 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/USA371018231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c5968c04c40a67f29ab6466e948fd4fffc8f9c8b5f7e38c2ce46ccd6a82b41. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USA371018232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8833d829b976f4ac6524ecf83d507c6b62b9528d87da7f8f40b1f22439412b9. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ES71G2504645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d757bbe596df03e9d0be47e6adc8e16244e23998c58f7b4bdae75e19cd236c. 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/ES71G2504647.