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 0xacc687f6aa2dec2e4161a7f9b58f224186bcd1da5d8883b84b9e4f2219c3d14e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b929aba-5b0f-44e8-afc9-1157e1142955.json and https://artists.proofprofile.net/proofs/artist/4b929aba-5b0f-44e8-afc9-1157e1142955.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 0x9ad672828d422ad74f0e6b136d63162374e89035ff709d16bb63733cfc90c8a3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:17Z), 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/QZTAY2227157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a4fc781ec7b40186811ce3dd2a1015a3e9a1c79a536de62dcca8643913a44. 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/QZNWU2210344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dda2531b4e6104303ef6a6fed24e4fe980113b62270a1a1ba83b8733e08e025. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAY2227158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79a70bb8f22e12e62fe59e369350d6e2f42f880a467d2ed6a889a4735f2e379. 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/QZTAY2227161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c4b2e1d5a64cb0199102de88198fcf2a8ce5eeb2c0847814953f5cc33e648. 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/QZWFV2417033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038e57b14cf207d313c08cf6419e726f1d1f1ee0141e47f416bdcc2a3c44e864. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYX2535165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12752c0884df6cff97c719efe22f9f8a39a790818ce48e475be5d31ff49b3cd5. 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/QZDA42527731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d54e390273e485a51abc9021caddd25b3f64206ef319e915fac453b5fc189. 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/QZHN52561812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040bbded23dcd643fc6a0373b9fbe19fa64b5be8a2610c292dca5853e5e2eef2. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:37Z), 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/QZHN52561813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a45d20f56fc6175ba5072af78f5d134bf9737a3e80bb2791d37fa7b7fe8d484. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:32Z), 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/QZHN52561814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9715390bb9aad896c39dfdde91c61e4b9b65220d770ffbf55a03471f42fe623. 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/QZHN52561815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc161c0cc69c827a721c35ac047f063b47cdb12f82fb24edae21c05eeb2a09e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN52561816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3ff834fa15e2b0a50f66b3ac90ed16bfe8bac0ed5d37526d14c5a1ba9e0bdd. 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/QZHN52561817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b787229eeb26915913e051c6164632d4dfee987f59460fdd7b8d245da3ba9f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:03Z), 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/QZHNA2552764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4096c7519ba82b5024455b6c01729f000c59324db49314abf1694ddf426a4cc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:35Z), 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/QZMEQ2512301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46aaa98d54c9a101114ffe278ccb8daa136db4e126dfb0a62f5c450db72f9e2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBA2518062.