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 0x3b9da3e3ce5eb02a7d4ee6ff4625b5a64ef9fac19c95837cd451c3fb61e2acdb. 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/add57b72-790b-408b-8b07-1a722df437a4.json and https://artists.proofprofile.net/proofs/artist/add57b72-790b-408b-8b07-1a722df437a4.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 0x31d333f87dd4fd49d263855ddfe7731d7dd202607ba832bc8252df9a516759e5. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:30:48Z), 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/QMDA72176233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edfca2ac88c42f2a7c6dab79374e8495d187b33a9685af60ab2dce91881e734. 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/QMDA72176234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d4c43f1ef04bac0994a36ad1038e381f18d530e13984e4afaf9b778f8241a. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QMDA72176235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085e15362581d7ae9c7fa02ae8e9d01df627b23ecf4d08d1bdbfc4422e2615c2. 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/QMDA72176236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09285e5ffb6b17f77602123f274fd4c018452a5d4ffc42ecd8dcf307326154. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE6XY2221864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72934a5f3dedae9dd9dd4623ea89732c82902d197305261f2eff933df59149c. 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/SE6XW2200994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bcf2dd2ce079a3a7104fd8589a4c36af4377f58da1a1b6d1367cbffbf6c9a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:08Z), 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/SE5752314616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6092687594682a0b5bfcc7314bc7d33fbd8446bf4295bf14295cc10404cec64f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:17Z), 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/SE6I32366131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fd26244afb2d12705c686189bd7d9a2747a2b7c115830edd7becd6bd13c6a9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:41:12Z), 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/TCAHM2361905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7911bea89cec3f02e21e74d9a439fbf0d98c7554fa386a80ae0ce80dd66fd4f1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:54Z), 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/TCAHM2361924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ada0113cbdda99fe323040a2b3af48e8dc3da58d7f691ed7e3842c424a6c7. 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/TCAHU2413390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e616a0dee6cab111efa6881d06b0942b733872d244f877a951771ff44d020b. 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/TCAIA2485666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fbc9cf5a2edb8b8c113530c4d4c5bcae96a8d9d7d7eb5109f41bda3dd1e3b4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIW2400972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb96f6f86d52863704fcdf445d17e489683ceba1772cfbe1f5236fd014861110. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAJA2454395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86fedd6cb3746585f1e1fb6c09ad7e9b793ae23cb5cbfcc4b9b00e465512731. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAJN2510504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b1e8d720fd342f8de937d5ca51351b20ad7aa05d52968c1287d5569c143ca. 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/QZGLM2438294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821287709278a26d4274d8cf6111b5e9f82efafa85c2be525e0ae60972fe5a3f. 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/BK4DA2425046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31dfa1e16045227666bb22721e65b673b81beee5935dce3e31d7d4385260fa. 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/BK4DA2415616.