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 0xccd8a857a13681969be5b0be0debdfdd3027352dbb89646580f68253b77c9d8a. 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/d12288a1-6a9e-4f18-a52a-56d69660fbdc.json and https://artists.proofprofile.net/proofs/artist/d12288a1-6a9e-4f18-a52a-56d69660fbdc.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 0xd06bacd68ec33354329d194b57e9b99df059960947fe1c2f0e44c8af057bf12e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:50Z), 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/QZFYW1939558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06bacd68ec33354329d194b57e9b99df059960947fe1c2f0e44c8af057bf12e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYW1939558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368746568639986316f62f924af49920b81832728c5f8e663b48232b8ed49146. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6N1917418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b9404963abb694952b77b89980d0bdb48bc3b8e652da89102a8217171e1136. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:50Z), 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/QZFZ42056823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7fb7aace8b205967a05ed92a37ea83ea671a3cf1660a535beeb9fab26630b8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:36Z), 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/QZK6P2025053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9389652bd118801c675a656b8d2e60441904be61775bc7f15c81a92d0e7d53d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:45:39Z), 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/AUMEV2149642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e36d5b9c142c4e81d3e3839a3de5e679a5a9bbc88711333003a013d361093. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZES82104498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c3cbed5e6056e7cc03224e00b1a983348fbd147752f7a202ee7e25aa1bce4. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/AUMEV2149652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b899854ac289c6859f52f1f6a2b330f564ec8bca805ccc2cebdf52461d498b. 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/USA2P2231691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5333f8d77c5eb7ed86000f4cd3b7f3b8b425b5707d7ea6cb7e226ab847857a0. 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/USA2P2314751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae764b41e916974cbdad31b438a1e3b4a06bcbdbc291cfec27be8dda452a6a24. 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/USA2P2318488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce0249c4f2f6e10825eda2dfc89b0fdc3d9c98bec73e23e13346ec3baf7b17. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:26:23Z), 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/USA2P2334264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9fdce95fd1e83e34dff8d3553f68e0c3d9c2cf56805d283dbcbbe69caf3112. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2352535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae764b41e916974cbdad31b438a1e3b4a06bcbdbc291cfec27be8dda452a6a24. 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/USA2P2318488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5bd4be32012a26dd33968c6dbf009c3d13829141ffcd4c8b2bac8111e635a7. 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/USA2P2309011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3cb2b18004192c1969c46cca1eaff5da0c754fd83f2c58c423659e8a3b6af6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CA5KR2424706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc6ea6554297a8aae4821a1e135b73ac62ab99c0f85f413ef25d37f3294942. 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/CA5KR2447385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c93525f3bd8135dc2bc3eb17d2c0789a72a7658ef9e17359420a0ecd377a153. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:03Z), 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/AUBEC2472655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368f87a34583072f8e8a9f4d41e729d51a3f908af86b56cd227ef689e577f300. 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/AUBEC2491012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d897f8c277e13ff30cc87e69f646640958804a0b9d8dd0bad3d6f2732693dc. 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/QZZ4J2401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa915e881a64aae58413af7078bba350fde85187cba7dd96e0e922c811c3b0d98. 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/GXHG92566745.