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 0xb7742306fd3d1e8bf6ea009fd2e3abcc6ae29569f70bfb5d490fe592acc83608. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33e47a62-eb7b-47f8-a469-60360a21640c.json and https://artists.proofprofile.net/proofs/artist/33e47a62-eb7b-47f8-a469-60360a21640c.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 0x00d366729eb5ec7c145cdca84d6b900ee12f03aa12d07dd789ae526a4173a3c6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZBRF1821413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654fdef7defa3bb8dd450a91b388d2bf79fb15bf81c6aaa67aa8ac2fd26b6b7a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:12Z), 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/QZBRF1821415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdc1a2738ef8e7b9e64e19ad5ec6708dd1b201e53c91a25110f57c2b1b98cb5. 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/QZK6L2195000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd2e6887226438f5dfb68fc8c5a83eb00e860faf25c8d6e83d32184bb3e9e7a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS672233651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb204dfc3139a00552aa9ad8cfc95f4ceeb203757a659b53ce992e5ec99129c50. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:59Z), 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/QZNWT2205144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a50a2a4be6a71533b04fc57a43af52f8478c12a2255a69515a50c2cf9a316d. 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/QZMHN2319733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe225c27a921cec7da38726578826f3a96c60b6dd79483adf151a3f5288463430. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:43:37Z), 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/QZWFG2346867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac81534ce86614f76f599bc3c84c5ed2df69280b46a79843ddfe8d38dca781f. 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/QZFZ22485120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc10890117d6f3ff60c1651179ece8165cfeb3cf6495340d960ec85b9c47817. 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/QZES72485609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa785b8d50acad0ecb7d2bad30045d9f77b6c61ea61b701d9f396c044b54519. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTAS2429264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e51446d16095a49e02e038925bf69f2b648cba82a5bbb8c3e61d0270152f803. 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/QZZ792441116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fbe5467ee10d9f504ad6ee2da0572820078b41b4770be47bf2e303a37c91a2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ792441122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2932b632ff01f975e94c61a776ff4d6641975cdb425a2849e7f599504a1d3d50. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7K2456310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914cf044c18b814cf8d171f479dd20ab20a20639ba11b6b2f5e99887d4337d42. 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/QZZ792441124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe343e55bcb28359d5025129460ad64b3e0f0e534421bdbe457e654279ed7b54f. 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/QZZ792441127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed0666199768deec974d39970d5c4345a213926c605e6f146cedecf97242823. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ792443843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda38d554074abc102ccf50533c74d741a3c8180169060dc07441ade32b87da7. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ792443841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fecf287ff035eb7aee2ec623f57a956a56e0d1e25ce8356e129d56453729e3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFU2515803.