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 0xe5a6045287401ae0f7d6e5969716a32c75cfb27a38170246acb519a40b6a2910. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d070029-f195-4a44-bda2-969cbb79b1da.json and https://artists.proofprofile.net/proofs/artist/5d070029-f195-4a44-bda2-969cbb79b1da.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 0x2c60258b08450a5dd74ce438517bc26f1d49d9e04e4e2a02bd5d4d0aaf0720f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USX9P2010141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad923398a85d759e917a5419a2e124264221aacb78e35472af2906bed6c1ad. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USDY42103198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5b2cc7c2af7dee58894cb86219c9310cb43e0f7104357ca07466cf982667f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2219764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6838c8710b0f67f14f145db069fed359a434323fd210294b83e66ce365f64. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USCGH2219765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457722cebb499927b3c8329b3dd8e3616d03cdcfaa59d008e3efdb7ea419a4fc. 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/USCGH2219766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e6f5c8acb0a6f4fa2bd2719129bf8b0f83975f0dfdba40b3ac6fcda0b5c34b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2219767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab2d28815155723e17e5bf2ae437c176accc9976a7125168c6c8eeffec77644. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGH2219768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a328e5dace2a8912aa24e590232c6724906b72922a9619601910ac7536c61. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USL4Q2155751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8604e2429172954e7d6f53c8c0ad382606368549939b0eefca949c8494e11cd1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGH2149931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3847af646c054767df098fc3a5bed50c17b9974c185c9fb4812b2b6642ea71. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBMA21874875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e466cabe0741d56712b7493a46a6e7cbe07b8d7feb534a729317c20b534b68. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBMA21874876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09d157512cf7932b6c419a42ab28936306cb26a82ef1036b10064c8eeaadc71. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBMA21874877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6869f2805992a655ac60a9193257813548c6a9f82d7c3745059646ac3f32e2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBMA21874878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe50c6f0d73fdb674e34b48e8c39493673cb1d6ec79b3ceccf9f7b370a52859. 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/GBMA21874879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a6c85372b9591fa8d1baa1022e8e0e7d4e760ad4c39f6a4b722c32d751677. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBMA21874880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2546c592e8c858041d4bae82caf3d8fe567ddd629de5556d59b8c7cfbc1f5fd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMA21874881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745d709f6a03a28099c133e72ef6f67e033927629a163cb95b5888797a832b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA21874882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8f33e302cf7e9adbf8d99ac7afbbd8fc47c124aa35af9d2127770373c78d3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMA21874883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a84f7a201e809e444f477731d9f8d2ef2f86ed114ce196546b4fa6290b9083. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBMA21874884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a328e5dace2a8912aa24e590232c6724906b72922a9619601910ac7536c61. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USL4Q2155751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad923398a85d759e917a5419a2e124264221aacb78e35472af2906bed6c1ad. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDY42103198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8604e2429172954e7d6f53c8c0ad382606368549939b0eefca949c8494e11cd1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCGH2149931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c60258b08450a5dd74ce438517bc26f1d49d9e04e4e2a02bd5d4d0aaf0720f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USX9P2010141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a81a8b99ac5c4d67cfe6ab57d169da0a0bb07447028f21e6265757d3b14dd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH1035997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac14b40db9eac08bf7b7a4ca2680d1cb17429d90128ce608d5cdc07ee9af263. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH1035998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df4f53e7c9fdbfc2870d7ae60f51d2509a0f632106ec911595f43546a457812. 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/USCGH1035999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67ead93b74a8157bbdaa721f674d4c7fb3214fa3098b20fbee663d9c434742b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1036000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a6076909c2193d5af32743b7cfcc74bfafc47b9cb1435f4151e28758b9843. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGH1036001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48883f7d3f3cdbf0ab8083bff7ffc541aa6eed21132531dc4b4259c7a568d6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USCGH1036002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f85655fd59721698a75c0e2314ce4f642aa85d89014c1ce3272f311a9c3a76e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGH1036003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7b64e15b61bd5c3030194c2d06299bdcd29a0924861970aec59b79f2f52f2a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1036004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c49e2d1e936adc639ade2c08808fa1f4903e1099097fc344d93c0db7a56cf1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USCGH1036005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ccdd44218c363c6cf3ec3a21957ba71c7e4dc8bd60f433e597f62544868cca. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH1036006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a0ed85587d7c8e771f9ff3ecbdacea9026de60e4c6aec13574a0e70c795fe0. 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/USCGH1036007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e4fa92d327db67223d3cdba60b7ad58a57330a3871f6ee6a945a646e999e3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH1036008.