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 0xd80f013a83d411f8cf329ba80ab562e79f0f8209393fa44afa6e5c83b5b3670c. 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/d049b3a3-5054-49dc-b436-09f2caea3a8f.json and https://artists.proofprofile.net/proofs/artist/d049b3a3-5054-49dc-b436-09f2caea3a8f.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 0x240fdd10e6be56bbb6d9964629aa8848e5eb2d847665ba9ac1e2f8b8f99e89a1. 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/QM24S1906325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765807b7124a7b601719f44348fec4edabcb8fc244746500b9d34200b41b444. 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/GBKPL1959830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eee73801bbaf1d5a64dfbf156f27f9e8b80cb02a467ea6132aa514d51d1098a. 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/GBSMU7451847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d66a423f14421474b60ed3909ffcfce71d8f4997facdbe5dd7d789a96542a. 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/GBSMU7451876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28650d02ded54bb4503b837104a66207f479cc9b15715e3d6fb828373b5ddea8. 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/GBSMU7452060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072eea9c1d51bcbcd25e43f6e950f12daf3c93d205f2b94993f0704a706838ec. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:00Z), 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/GBSMU7476044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe857268cb683773671d42a997857d8f17496a191fa9573484701b907efcc5e. 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/GBSMU7765566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e26207102c893c4c7e60fc4d0a81ef01677dcf6afd72f225dd02b33ac9f112. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:52:35Z), 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/GBSMU7765568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8344474a3f4d545d849f9a66add3248386dac9381ba8bcbc77e0bf95ce6bd79c. 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/GBSMU7476077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae72f8bfd1b05e2062883a70f13d25d5d7d6e834550f5d65773d0252766f2bdb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NL4WT2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387945c5b19a595955f392bbe44adf50bf1820f55406a6c004d7fa3f679d84f6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL4WT2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5431e92d56472305db0e947a28bf0bc171c6fc222a5ddc13378256ef355107. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NL4WT2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3118f24494eef8b5a0207c59a9a11ccb2e1edeb615d9240974e6f85ec19cda3b. 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/FR9W12111863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f518fde21b7dbf730de3b26551e4bc726671193f98e1350af74c954a6a279e2. 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/FXQ892100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb798950d5ca96bd7910c939ff2dbf4403e695dd59593f04f50bc5c38a868d138. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUGBT2212189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f4de9877844675cac4e6dcb30a6e1ecde300691658daa00bd76fea7549aaa. 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/FXQ892300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a31ab85761e5e1e6f95e1926c87480ac4c6e6d4d5286f712958c9e33b3761. 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/FRR642300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35af2d2104138fdb0b63142438c54bd5cc95e45ae7a816e2a16a0c5bb4b95889. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2312829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5a31ab85761e5e1e6f95e1926c87480ac4c6e6d4d5286f712958c9e33b3761. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRR642300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed6cb22202f9df34d37540166afaf522b03de6c725a36261efc1f45de4931c1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2324531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e1eeb6e176b15cb4e5f4594a165a9804830c73f961e8e35d5a29eed172650. 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/AUMEV2336840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19516677bf239490b7e2a26a617dbe47ae3af785993152f89f6523f4a646354. 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/AUMEV2336856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d20fb655f9cb9279d8b5eee0351ed6dc14ca203c8ef38bd263d40f6e941c6f. 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/AUMEV2336863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958241376675038dc3b02e7e7950292706bfece5cc78667a57aefd2f3b070f9c. 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/FR8FB2326500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c46d01916460a8aee81a5f75ae3bd1fe60acd49fcf695037b95203e5f89810. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRR642400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f6027cfe21c566d9f64911a96f581312f65f42f54becea51cd5d2fb48f01f1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRR642400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c46d01916460a8aee81a5f75ae3bd1fe60acd49fcf695037b95203e5f89810. 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/FRR642400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f6027cfe21c566d9f64911a96f581312f65f42f54becea51cd5d2fb48f01f1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRR642400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cf2372508179c4a07127e793e46d41a35ae5315ac4f506705802cd14a460a. 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/FXQ892300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74111464f1037bd7d81731c63d7f8081e6f37289fd0af21f29e7f0f8ad484703. 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/AUGBT2207260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9267ee2e2b7f506eaead73a63faec0d09b920af56fadd20df8a93f8e1b9203f. 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/USANG2451173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ff5bdcadca5bdf0ee94405ec4685e72683bb65fbed6031c33fff3dc9b29ea. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBSMU5043480.
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 0x372e69479d24c0ed88228b62a8a4d3e476c845a75bd78c70585cca39e1f94b70. 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/FREO02400700.