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 0x5c76f63c59849c61bc764bf3071496438487d961ccb7663771c6cfb3c215c8dd. 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/d2b836d1-aa07-4a3c-8e28-eeab986f1a04.json and https://artists.proofprofile.net/proofs/artist/d2b836d1-aa07-4a3c-8e28-eeab986f1a04.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 0x0cc82f2591823ebc4ca7231a93ce8a8fcc618b4f27b73a19977b9103e4dc6a94. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USL4R2319371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4e285dbfdb17575443b2bc87713ce2949225f1a6342a2b5278c46a1ba12fd. 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/USL4R2319372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee65937be671afab828259700546a91203b29a1fff458578b236eed1ee0221b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:52Z), 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/USL4R2319374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8ba694d6a7e3a51185b23a7b409340a8c1f26d9a158165b9f08fe4617a0bd8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:26:38Z), 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/USL4R2319375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b40f93365aa3597edb390f5300cc3ba8aa124e8843988191166859669556a8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4R2319376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb850adec5d056e0dc171706df8eb573fd540ab72db74365ebb222257579b954. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:49Z), 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/USL4R2319377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109c8952fdb457f0a23f177ea1b52c8dd915c2ccabe44c56b7f217b841ae1e02. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USL4R2319378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74782c3c11256f21c5c84435f6c28bdf5daab7268067d1f3cbfbf0c513797ba. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USL4R2319379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48be64aeb46977efe43b1b7cfaf31a4bba9554402fd2cb477f5dc499b79ba784. 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/USL4R2319380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4e959dae2e068f020a81794ce018ee4a69765457c7f64b16c7a52cf441f0a6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USL4R2319381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce1820a6bd29b3553ac437f180d1a8d3677978f071be8f7b9b3ab73f4cff365. 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/USL4R2319382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4062af1a099f24999e971fe636f3b5f123b8a8568c5c32325d1c86fb27b118. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2319383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb67bac6135768e36735d7231fa99d70c2e5666a83f698f6f21bac9b030d5ec9. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USL4R2319384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555743537dd2857a05b612e95161d71a7a7e6fcf121d32df12be1b670d265f4f. 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/USL4R2319385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ab915d0a93e8c1f1033d1c3d967d2284b736366bc1024f6638e46bdba58b29. 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/USL4R2319387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ab7910397e092f5e6f17470ef2dc9113e7b12ccc64c49aeb0420ce849afbf. 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/USL4R2319390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c7d988986df707feed5bbb63a4ce8a08666aba50dc7e68554c720408944422. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4R2319436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acbb2b00739ea0b6b269b8256aabd0d32c5e3ae9e6d6a87cea41db1fe9800d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USL4R2319437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210477ec9c1bd37cad86cd5c9cbb4b7f8fd51c6adf28ea5a0410c4c20340731b. 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/USL4R2319440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dfb081aed99533eac83a47ad2f53dc4a3080961b665e915776504f87bff711. 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/USL4R2319443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c21ae81fbf1946cc6a595d95a1308ccb6d19bf654e7ae56683a0752b8cd729. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USL4R2319345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357468dcb6b304ceefc6a5015131fc4c1893a9bc1bec48ab263aba6b87a9200. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:46Z), 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/USL4R2319352.