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 0x015612d8593183cae758c198f67af1a090343ca6d65156abac37373091cbb81b. 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/f921b35b-8db6-4d59-bb82-68dc859abd9a.json and https://artists.proofprofile.net/proofs/artist/f921b35b-8db6-4d59-bb82-68dc859abd9a.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 0x41306c9eb3efa1822ce6b3eed26b075009ca6db6b8e9cf57cd69533425483b8c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:07Z), 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/MXUM70803838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf175e2999a57e8cdf3515bf5191859ad659824c7a7f06935d5a4b32b1b5e916. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/MXUM70804680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369786c150c1dcc69b733df86791ff529265eeef30ac4f0324f4c4cab8d9930a. 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/MXUM70803839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfb4e8afafaf4ab40c28b6e0c61d4a89d600c61d8e8c33c55c91e884b6bc2dc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:30Z), 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/MXUM70804681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be2e8b05190648e8c8817e97c48ef2bfb606bde5c9e8bebe47357a0a8684427. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:54Z), 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/MXUM70900677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24d5e69dc033792fba0e54e45b802846b8e54725a05c31372e74365a7040fc. 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/MXUM70803836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c2c60912ab76c1793d15db97774915934ebea72080f05d65a5953cc7b318b. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:26Z), 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/MXUM71000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747486284961c485545b737402408384c07365f8a6fe99effa353ba5778de9dd. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/MXUM70803832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b967d30e6ccd5c4c0858a69b9a5a2816cdbeac736691282ab4615d3dff71b. 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/MXUM70804685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20899c4dfd2e29eb3337acf19e431fbea46e8dcfa797147c8ddc9075994ad009. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:07:00Z), 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/MXUM70804684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd352f02943aa50d0c4f4f49522ac69d1089adbd775c279536a8d4f08e8e048. 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/MXUM70803828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4babff1e746e22c976c4bac239d720135b31fc944d57fec9c379477bda6219f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXUM70900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732b481e78873f961b4f49b36ac16ab016803235b8905a639bc9b0aea750b1e5. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/MXUM70804678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5444ca31ae0fa59cb46f9403e872d4dc6109770d9dd43a317e041f299be5660. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/MXUM70803831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1610d174acc0b8ad75dec2c34a832a6723156a9f2692fbdd3e2e10a4607e25a3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXUM71000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747486284961c485545b737402408384c07365f8a6fe99effa353ba5778de9dd. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:50Z), 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/MXUM70803832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b967d30e6ccd5c4c0858a69b9a5a2816cdbeac736691282ab4615d3dff71b. 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/MXUM70804685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f19fb38db96d5c31af8b05d4df432a0e5e4658edaab0847d73874d89ad1437. 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/MXUM70803833.