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 0xbc33a9d6ea05fe486be05ffb88eaa986abed1da3aaf1de2c0633bf9e9aa51e64. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/affbd7ef-9bda-4130-bd43-c9b349b4bf79.json and https://artists.proofprofile.net/proofs/artist/affbd7ef-9bda-4130-bd43-c9b349b4bf79.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 0xd188a309b6f927925844df2acb234962ae3740289de2424f6b13efb42bcd7b44. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITQ711100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6038e27c76b37b3dc682875497ba5d62dfd8b4365fba085c6af9f8db6216281f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:15Z), 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/ITQ711100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6493c152183f5c1f20f6e26500317eb5fb021f680b5f14ac7ab81176baca6642. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:24Z), 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/USDY41520862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ecbf53d1a7e89223e283ee34dc28bc98c747379daa0f064d0b188fea8fd86d. 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/ITL771802895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6769e81be03d9afcdb84fa54078693306c6604414d2751d55a320a26f61b4aef. 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/ITL771802900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86a41aa9bfe7528c36b26b73550a4657174e79df2b85787b14d7dc9d916d410. 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/ITL771802901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f7bc9a62dbac71de5a35cbe47cede5b0dcaaa80aad89a10c0513d01e41c80. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:50Z), 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/ITL771802904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2c8d5eb3cd4ece42e0ba90dbb4c3b5099438df6cf3a9842d067fdee7d71d10. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ITL771802905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382428df7e595f35e23658c041cd1546cb2e43077a45948279ee66c0e73742d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ITX4P2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07648885e6790fda2ee240fa40e098eefa3cd856cc66adc0abb73ea7490235d9. 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/USA2P2228010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df5b8794e6be72bd82fd36431b3f255095b43d7d9e7ccc7cdc5b1b06f3fa0e. 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/ITL992300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e740bd856217faa3cf475e5c51a12571b09609076c602e24997f2758a541e8d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:24Z), 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/ITL992300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa24386689dbe9db8addd7594682b057bf0e2f9e496c29ca95d9bc26c399ab8d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:33Z), 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/ITL992300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ad9939e27ba78b21918df672fe67f971cef2e4504ce6293b5fbd42e5b0bd4. 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/ITL992300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a881d2a5e05d09b5312f36706cb9991ca00433dce1c27816602277dc23853ee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:36:38Z), 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/ITL992300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e8260211084e8e26cc3efaff798edb7f93d4af80842bbdbf71857f02f88e2. 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/ITL992300055.