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 0xad1fd2cbeada356b63a7d65106db5bcd478d2e9b2dc84c4417b5644c70c4d097. 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/3638d094-55ce-4de5-b43d-e1bed5202da4.json and https://artists.proofprofile.net/proofs/artist/3638d094-55ce-4de5-b43d-e1bed5202da4.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 0x77f44ec910eb7aa0e3aac46fe7e40b2c70759b72e5206ac760d190427b0da744. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/COFC10910470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac42634b197ccafad3ba7fce8d9970debbc6850bd46bae2658b3eb34923699. 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/COFC10910486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69a22791173c770a5a8646d9f30c230153d4795ac0077a0763a72fc8d071713. 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/COFC10910475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d884c8a77e54b6ba78881f8e0bed87d6902519b1f14eaf9667e1d45978df6c0. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/COFC10910477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e98bcfbfbaee63637e7a24850593cecc42a2d23a990c11b17b8873c3a4d4c6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/COFC10910492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd4674a6a86da45d2d973adbbd40dcf3f985992688b864a2fc7526e1a0c7f6. 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/COFC10910493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d34aa4af1340eefcac9ed2d2d6bc6410cb96284ad99697856cc1f591d5a41fe. 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/COFC10910496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cd804cbab21de8797f0b4e1385eef1b396feed6f2da20e4b4c4b460411793. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZDA62550330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914512ebb5f7b752e016f09bfd5f41e07189e2bbab8a2325f8249c450cf38248. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA62550332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d86a360b8b473ba4dd789c9e8c3ca6d58a29cb016cc0c054e48cf37d6e4c4e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA62550334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a1f8ee42f317d468810de2843b16bacb8cc8ab7572c345eaab83d1386f6120. 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/QZDA62550335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376849c5a8348b8605cd0ac9f85a3a6bf1424cda13e11e0aa29b54a4d9e6286a. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZDA62550337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76514971d1abe1b70fc4d077a06d124a45472a8ecf9eb7cce62726cefeaa7575. 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/QZDA62550338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7c4fd78f086e2c8bb14beca7a4a45447051544e5dce07707b125ba748ac26d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA62550339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b869e4414d33401009474fe207299986764db76c6bb87db4818a4a928367ce. 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/QZDA62550340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603496c51a0d93525277825a92f4da0ac91e3d0b802a1d7e3f50c8583880fc5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDA62550345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae32f986778c4967320de77aa14b602fb509aba572655cbdcd6e6edebfb637ae. 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/COFC18005503.