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 0x78449d2bae6903ef2413d896333bbb9f91d912f27976941848afbd5d6403def4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cd10743-a239-45a5-bc48-3ac42d6a65f4.json and https://artists.proofprofile.net/proofs/artist/8cd10743-a239-45a5-bc48-3ac42d6a65f4.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 0x4588d57f340dfe7753bb72605bba22c47deaffbf5f0aec54c16a32d5e442c44c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ22494598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576168a8592f93b88783d2eb82e16bb16b465ebacd2034adb49f367fa96ec289. 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/QZFZ22494599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0e8fa6dd7568f792eced247bcdf15b4c69caddc7a1a96aa11d9d05e052b6a. 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/QZFZ22494600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0675adfbd7e0a4b042c264f0df10715ddb4f6721424dedbbdcd3133b7512f4. 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/QZFZ22494601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91e4660ff95f87c8374ecbf51b174c290706e24dc09e513d3794e11f0e62f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFQ2386325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8247a14cb729c28135bbec4f55683ef07b25d000bc54122ebd389c8cb5c0784c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:30Z), 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/QZFZ22494603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6f6b72edf62448852e4157a9bf3affb51a22cdcab633004ffa6a31cef8b9d. 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/QZFZ22494604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f4b51ebbaf9db48ceafce2baee2c671d283df7f8b28b9deace2e7dab7870a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES62524402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3069e9ceb9dd6f311af9aa944d9b2f6e5f2792bf5b715f77d6f580840bec2e32. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2573817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebdebbc55eee1b7d8e3174d85cd7d5f06813ff80d52cdc0954198b9b1bb8e5a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6P2550339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a594ddf8defc1733a28a69b4453d1f224acfa3b0096d21ea03fafb81dc7f400. 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/QZK6F2573818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba6885f19a80fede0e81cce12625a1d95f3d429d6cf64c2902423a28249d14. 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/QZK6F2573819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133e9194f96c72cbab8e8c692e58c5b723a94ed9fe9836f5835c3fd2fbd3408. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:50Z), 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/QZK6F2573820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f4b51ebbaf9db48ceafce2baee2c671d283df7f8b28b9deace2e7dab7870a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:17:55Z), 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/QZES62524402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14314fda64236fa7e02c6d46865e02d408376481cbfa8115a9770f6145535617. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6F2573821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8dbfecd88525ddbdd29b00526cb0a0eced218f2c336f30db1bae13ad5de3f3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:26Z), 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/QZK6F2573822.