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 0x155fe3c43dd86abdbb0c7475d8c5d284687f371da1795998ce7ec7ad5d7dc4e2. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0a1046d-6b44-4a1e-98b2-8d3aa69ea41c.json and https://artists.proofprofile.net/proofs/artist/f0a1046d-6b44-4a1e-98b2-8d3aa69ea41c.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 0x5bc4d2489946b2825d122091c4a5911dfa0854ee57f3c128fc4fba56ae521b56. 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/QZZ762497898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76864f3d2dd4f570c0b5d64130fa37820cc410cbe7ac8925e1bdd68abffc1c1c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:20:22Z), 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/QZZ772448031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91c806e2acd5519fb9ec8f4264b5c072179ee258a39c0dec1ce292e692eda34. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:44Z), 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/QZZ782480423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca7ad628c97a488fedc6f1f1a8a1fcab648bd5d085cebbfdc57f8d10b7fa2b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:55Z), 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/QZZ782480416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d597ab4e40b8d733e9345bf6952f5affb4087854bbf363f43bdaefc94b35a83. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7K2427498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b83a73d8dc327d7d13d3bd9aec38818d20cb4a440ed5a4a3f8dab33c232e3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:32Z), 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/QZZ792415832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1852e9c441e570a43dc7c0f56733586ea975745c741514c2f7fa282bf3b6facb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:07Z), 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/QZZ792462519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e90395e6c70c4389c38a305f75ec60147a79497d713b95bf0c151052327bc. 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/QZZ792417803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140e006cd0779647d5798729fa98530678c7d7a35cafedabaa6711fb6485515. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZZ7K2447722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89efa04884b897089d49437c5417df1c1fd8e4287c4ba962100a36d6d59a5155. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:55Z), 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/QZZ7L2464664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfb26d2989f48acee1863c2747a09676dd3373dae762b294d3cf30a2a6088f1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:27Z), 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/QZZ7L2486484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06639bc00e73ecf4ae769e01d2078c98ae70f29018a8875ce56fe309f2035c5b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:53Z), 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/QZZ7L2436004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4282b0c076900ebca3c46960797b1abdf9c9d4218d56175bfdf15bdc3673be. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:25:31Z), 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/QZZ7L2464737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c72ddf21ae271231fb830a133302f2c659a6eef25afaaa1e29a6ffd53a5cf8a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:33:48Z), 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/QZZ7L2467648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32614cf8c24286e30075e2beb7f6e9cc6c8857121f3a2a81b7c5b8bb29feb685. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZZ7M2410902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989bd2ac30930d6040c222884ba9006d074964132343e93b650e445c7250bf81. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:30Z), 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/QZZ7M2410900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a58c295009e8f4308b4c84f95a28d225f53370d25b96f14b3c68b48817b0b1d. 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/QZZ7L2484396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00f52d57907828db463b928fbbc37d70813b29e668936d262b52ec0885bb46. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:12:39Z), 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/QZZ7M2484950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236c61c5cbe4db18bf2cf988f2e19c348e2be1a9c4b0c25e04693829d2a2dc32. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:58:32Z), 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/QZZ7M2484970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c48b2ffc26768bf4f6a2dbd4aac5ac6f26ee836df7f2425d14150f9e67b19. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7M2486856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9db38bc47213966f3de9c2b450bd3e6d2cf17a12e4b7aa411e60217548c2fe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:09Z), 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/QZZ7M2486855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e695bb89ef91f340a2451ead9e32c3b423d43bcf3f8b0c0ebfeb6262f7479c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ7P2412014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cebb534294ffe37d5a3e1f72fee4d64ff5c91b7a7eca78ae95fe7bdc76c618. 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/QZZ7P2412012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8591407a44802e287fa2929c9158c284b72a61225d4fe16e688a213e2088b6. 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/QZZ7R2460801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710f89ee265724afdd647bce3304ed32c6125a89b27d7c13acae91637c6e2e43. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:14Z), 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/QZZ7Q2464010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03fd2cb06a26e3373abedae2fac91d6a654a5e570a331a53f8094f9e14d662d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:17:03Z), 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/QZZ7Q2465211.