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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29186a5a99315fa00057b63cdb1604eb306af64a146a2c74308638ba09221f4. 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/32276385-cb0a-4690-9404-df4c661d66d5.json and https://artists.proofprofile.net/proofs/artist/32276385-cb0a-4690-9404-df4c661d66d5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb57de184fd17e86be4a00ddc2141ad911ef66065edfbfa6ce389011aa825e2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FRUM71401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7f6ac98e979db16ad9c1a85c9d9625ebdadf1c3f329d98d7554c7bd0dcbadc. 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/FRUM71401898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d522f0300410b4b191c2a305d7ddc1941764de2c27f19f320e695e96fd679. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FRUM71401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6de77eb0b9ddd813e0a6254d50ff49a1410726d7ae8a3c976b98dfce1bc5e8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRUM71401893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eae9040b1ccb0a9abab7c67e1513a69fc676982a60679ba63d3b15d33fcbd6c. 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/FRUM71401899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6dc79bd64a7c6780682a38809c69b8f4783cc3f3cf96e4fbfd6e83328c93a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRUM71401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97343e54eda91e2d5ead593ff71730cdbfc787927901b67e30da8b47e38ff75. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FRUM71303083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7de937ac57fe459911019ca010d91e0a58a243c5680bc7c31ba290bb0b27bc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRUM71401868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae71c1c71a41c14bbc990d21c7160ad34fa6fc846957429263368716bf7d41e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FRUM71501612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dab3cb0ef77502a4345b81e9dca119835c68dabaa2f094dac0fba09aee1f17. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRUM71500822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084853ef7a40e3ca039a5c0bb85eb16770c95e197bcac7de5a557b8c828c1a61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRUM71502180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b630f11d22320cf8d001abb20209359809f19c11489704474748e204fa32d4. 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/TCADZ1811967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe877055feb13cbc5314878c5f20170ef8f1a73d1052ec79ef4256d01d49ff5. 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/QZPLS2179636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542d9fcc385e171dd304bf556c8ae361e098474e9d1b0a0ecb1e5bf5f05a1485. 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/QZHN72316671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17336d8c115fcf1248c316da55b2450aa53855b69117b052ea96f0ebf22fe8b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA82033222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b2b41352986ac4606d1e4a5816b40f8ef98bcf5cca0b1a2eb94893b9a05596. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNB2222251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37baed8f06f6bcce0aea49ee36b0a6794cda36d4bfd9c6b6e822652979f54f89. 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/QZHN72316675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb2228c1b1a3371a7b912f8a07ff81652aa1924ef8503aae2860f49f8c9e5e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72316676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4d3b963fed2d740809d4196c894889acd0f491c7e8b90be44a57121f6a12a0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAIX2413073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa740c7843fce365e8c973a45a57e0aef2c30eddfb8815c845acb6aa635d4e6c. 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/TCAJQ2578687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b171f7d7dc2cac298ccb90e89fe22221fe848a3ae95d8d859f0a739d62491a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2537260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314fb72b438b54a141e57c8871202a4ce7fd8b05f85973a4ec65760b91f47563. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT65Y2502308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5cd7350a6e5bde3fb78f1516c1e368caf820be3d7a9ee17c8c22a60e659a1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT65Z2572859.