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 0xcd3b545ea4fd3d7d30406d58f91f91019d5a9977bb02ea464bc8e081146ae80d. 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/ce6ef473-58ef-4f38-b1c6-8f2102ed0db4.json and https://artists.proofprofile.net/proofs/artist/ce6ef473-58ef-4f38-b1c6-8f2102ed0db4.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 0xf0b67c9a1b2cb22fcdac0573ae13811ffa24f769fe4bbddf2c293313c4256f9d. 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/QZHN42046706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c9f7c37ca70e3d63bc27ff79b7be71f3fefe404e1da7adcb4580b7a16c08d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6G2083478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3381f83df461ac6ef818421424dbf15a0fd7b8b3b2c495268f2188d147383d41. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:58:23Z), 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/QZNWU2020180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1249e2a4bdd003fcd87454e1cc4443ee76296be352e61fd527bfea7af0e8c507. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ42138346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24314630a1338117fb6c01c592dd5e13ad9f6a8b82f47d055a3a507aef8074c6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:59Z), 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/QZFYW2109826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83bd39c5804120431a65b508d335c531d90273299bb328aeb635663255ba5a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHN62014121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa99b7a8da83d9d8c39c1defba679b1baf7c787df98076cb5d6f41cd002a2ec. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6M2027158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375d64670607f45b7272c1fc235873278f202ae6be3cd090a6c142b27718c50f. 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/QZHNC2046187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12a74274ae5ec25deb7026a6b8cca4d1017a1c46776e0cb71c868919e501cd9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:55:12Z), 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/AUMEV2154394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edcad52ce74fd1b60a2a2f24392d7ecf4839fae21e5295db8a9079187c183e5. 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/AUMEV2214498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6188d09d5cc36f78f671accaca5c2d00d9204b1f6ae56140eefeafc40b833a4e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/AUMEV2145533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833f6e09a2c5d8ab2f572c8603f0c9e5c4012cd7913896ef64075493aad6fed. 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/AUMEV2255214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0edc9a88065ee744be0d9b94c8dad88735be339b710a5d7c029e6858bb68b1. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AUGBT2204981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289b694669f0a403e84441758b29c9f37a57c137583cf4f4f7fb9f1bcb27864. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUMEV2316894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946daf24c19ffec0a030153832c295a2ce6fbc3a7616b8d3d1873523aef6625b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:21Z), 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/AUMEV2371546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2950e5fcebf41bea0aadfbf8722cab4c4fa2e2d89264a7d32a45d84362d64b1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:55Z), 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/AUGBT2301322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe697c5666784f6421c3464760af701ff8d0d9e811d71d7ff2c6a6591533d6fe1. 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/AUMEV2393160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5bcada0152f38dd295db94eeede9c508310c033e1d7365fb7f09b4f79e1f7. 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/AUGBT2329169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5bcada0152f38dd295db94eeede9c508310c033e1d7365fb7f09b4f79e1f7. 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/AUGBT2329169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a27491a9f7f979a4025b5fcbfe6a15d6ad51aeb54e9fcd78513cc2928e57a6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:22Z), 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/AUGBT2307682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4605a5188f28dec19b41b25ae308d79474fd8b7775e989c29e04af4af39e9a3c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:01:33Z), 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/AUMEV2381106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad5bfc6829fcc8af62c2d314a2439bd779ed4aea34804cbb6b3bd4aad6ec4f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/AUMEV2485007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea77e9b7dda2554400880dd39377e7ab75e0fa94b22923cffa335211d8dcb3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AUGBT2427037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7c87c5b26bec31ff5bd75a7af04a4b362266e7f7f06abb105e7d3e0367a48. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AUGBT2444346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbe922520ef491b2fa737a845a5e2c711d4d6397b546117781d7fb79e8edd2e. 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/AUMEV2509294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58480fa3b7ecc89539ceff50f787877deff83b3df82f5c835fd41ee43116a02b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AUMEV2546118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70408d4a818d67ae1d1ca009a0814560449235c0c5ee8a522ddbef4edf1725c. 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/AUMEV2575081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7c87c5b26bec31ff5bd75a7af04a4b362266e7f7f06abb105e7d3e0367a48. 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/AUGBT2444346.