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 0x2cf3eb0c27aa8ea9d8398bb1b29c8d29520aa5761e837b7b4a90e18725d001b1. 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/b7553a3f-8f04-4ca1-9766-b3a681d392d1.json and https://artists.proofprofile.net/proofs/artist/b7553a3f-8f04-4ca1-9766-b3a681d392d1.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 0x345d87a679fb17c60dff1549d54b597fdb0e30ee64ba64a34da00ddbed36024d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFK2360556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1ddc58e78c8ee890f521d9bee8b654eafab2bbc6fde1776e2edf10b3d05e90. 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/QZWFK2360557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679602ef10257368f5e2f46607a1175a705bea4f3f4379a646f22df0caf2304. 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/QZWFK2360558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ccb315b5465bf869e5ac0437c474b24034bbcf027ee3eda95ed19ae1da7d49. 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/QZWFK2360560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fb6f937fb4b333b6f462827d4c95d6fefc926bbaeb32f827b3298c9a66bac. 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/QZWFK2360562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353b69a2fc222a147854bd7149f08c4ed381f261102e675bbfb4ec93f2328b4. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZWFK2360564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3634c1ac7ee9c3aa458d8a02ecc7acc3ee6450813b107c56861c8a20e7adee. 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/QZWFN2396422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12910e0676629bb6de71e887e9ca70f66cd621800aec238a3bdf2878ce21bf4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFN2396424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb48a302be58dd3135a1cc94d9797a695f2cac0a7bb57d7498edecf389be7b53. 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/QZWFN2396425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfe36c7df0e2dc2fccc8e15370996bda7e57b8c65f257d24b5ffd2c1182b69a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:20Z), 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/QZWFN2335417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea091bc9a18d2783b91547d86e88b7177c48edbf0cf2f80c418f026e2e21c878. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFN2335418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe203bcf9a1607888af97275ce504581e74d22c1505d042c837da3f09935919e9. 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/QZWFN2397278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bcbd03e6c28d0eaaeb8f8707daabc4cad6aeac0e887f4f8fd9a4f351d8f17b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFN2397280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559178ada9c244562b4a7cf984253eae2bbd5c6e36985b4814e9dde186698742. 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/QZWFN2397286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae203b5bcd92230c58accc0e7f427808f5f329a57ef84938e6c1528f426710c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFN2397287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59417dffa9f5744008373c841543239b6233e5965893e7e6e54e6cc5a89d248. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFN2397288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bed07182052efd06d4beee5fb7a9e04fd78a01da5cc6f5b4b1925e767c1810. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFN2397334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063b3f0c6b2f129d5491228abb61de47e294aeca1da5c0038dd7c686dc765272. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZWFN2397336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4727c7758e8d00f86abb7bb0beb52d4aad3c8ea5758bfeccaea1f71ebffb7797. 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/QZWFN2397337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2113ee01fc8ad20abbaf4f37e3ac002bec3b14b82656fcbf0395afc6a457df1a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFN2397338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378b582200d5e214946db330aef1fc5af9f26e509908b554dbf2f63b2c2f3afe. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:02Z), 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/QZWFN2397339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1978f88fbd77e77e0d5aafe16de9480b6ea02d6f29c7f491116d08b88c497c3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFN2397341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e2a330ada753e0161c094fdd90fd4c4e5521c53ba3c036a28443cd62a7aa36. 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/QZWFN2397423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4b4fc9fdf0cde70eeace7e50c567331168d75e24fb34f979b66f767a1c632. 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/QZWFN2397428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832561ead821eb93a7eb9401156c2d9b4913893c0e8f7d58be6e32b70f2379dd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFN2397429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856214880ce37b14b0ad3f66567a3934855c636e196338bf01f0e33ed28de5ce. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:40:57Z), 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/QZDA42419668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348c5632c552dcc4f919dc6cfb824e57428681778e826fcba2a804d74e54818a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA42419669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca68c55c5946854cfc6e0afea492ba157ade84412570543f7ea0b3013d2ded0. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZDA42419672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480285278ad90e1fae27f1b626b0566c3e7456631f6170bfdcbc6e1fca5c4203. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:03Z), 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/QZDA42419677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bad7368d9f0b239bbb934e9a044512cfe8c86372fb1073b5b90432b77caa01. 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/QZDA52409965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60115519fbf9813001059f22791332cb99788508f81fac2dc923ea24249e2ab. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA52409967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57b422a7dcf0607ba612f07c19c7315e810909fb4ced6de08dc35750262be9e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:56:41Z), 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/QZDA52409968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab220bbac774c11342d26d5a4007de4d8bd261b2acdf1a85c2c8dc9f0f3b2b8f. 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/QZDA52409972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15f74369f93b914144ff0a496b0b3aaa905d9182bcd241a8ee7d8fbad3e3437. 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/QZDA42495905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c1157f1deb7c48c7e7475c8b9b4f6f20730091defe3466e651fd9d5a67130. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:28Z), 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/QZHN62412454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b2f485918bedb5c12673b99712fffdd5fb5105d5b9ca53158af72fc431544f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWQ2416559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f04f4be53886f6d1eb73bed8a65d09eb99b30e1e85b68cc16df511677d2e0ff. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:07Z), 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/QZNWQ2416562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4558cc40b559c23f0507e386c6b43777fc64e0758d9d6335932310345335d08. 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/QZPLS2414226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe278d9c577f70dfb6d239dcd7b29999a84b832ddbcd2ba32408eaab3f68f807. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPLS2429771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024f6b0fe33a7ec22443cf64bb69fcb7344fc35daf6ef05ea0add76021ce407e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB42400687.