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 0xb9b4c65bda9636aa8b53b5d425e7027ce9ace04d95f3f975b78665f8a8a7e940. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b470f4a0-38a4-47a3-817e-061c0ce401a3.json and https://artists.proofprofile.net/proofs/artist/b470f4a0-38a4-47a3-817e-061c0ce401a3.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 0x08fbf840ab5a838c2514ab0c4a4763ede80a29ac5109347e20aa98ebace44f0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBD2569987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfd97b21e06a3cde5d9af7d86331ed440046305814da3d7fc7b472ca311142c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:58Z), 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/QZTBD2569988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c98b60a16429215e607e862b6da553f189136cb3ab7ef638526aa7ffe0af9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBD2569989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11fab370c0f63c476ee7d6e656d734a4e70b89c82958313771c01a2208a4127. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:47Z), 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/QZTBD2569990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1e7d1fede0a9dc05ffdfae461978a81ce7673140142103d679e486b4600d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBD2569991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500e24ebfc1656b118dd0fd50181800959555f91b965d213ded9624cd3dafa9. 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/QZTBD2569992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc9d9c6af0a578943b5cf60eb6a75d47af11fb9301a97c5ff9fbfa6151fc0ce. 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/QZTBD2569993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c2255f6d958dd69f6b3523fc9f23e48e8c7e92df5895ed440d2328be89650. 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/QZTBD2569994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1840d82d107b465e62d04ebcfdc57788fc2ab66ef33afc18600330d6eda5e76. 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/QZTBD2569995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc7cec8ebd0037d434e406fdaba1eacf6d7f9f610fb1d93bf19d74b99384e34. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:59Z), 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/QZTBD2569996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6afdad3438bd60d9f294c209541676bc0c5d39f6564becff0e21ff0f6a8ccf8. 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/QZTBD2569997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd57f72dfe9baf721f9c0cc8469c5ce393975df29132bbd0fecf262b212e05. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:13Z), 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/QZTBD2569998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23ed59e6942421d2b4c67a15d83b6821266962e5ef7ea28f1cea15c654113e6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBD2569999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11fab370c0f63c476ee7d6e656d734a4e70b89c82958313771c01a2208a4127. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTBD2569990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23ed59e6942421d2b4c67a15d83b6821266962e5ef7ea28f1cea15c654113e6. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTBD2569999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfd97b21e06a3cde5d9af7d86331ed440046305814da3d7fc7b472ca311142c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:21Z), 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/QZTBD2569988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fbf840ab5a838c2514ab0c4a4763ede80a29ac5109347e20aa98ebace44f0a. 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/QZTBD2569987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc7cec8ebd0037d434e406fdaba1eacf6d7f9f610fb1d93bf19d74b99384e34. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBD2569996.