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 0xeef575c390c4d0f29da7cc62ddb2caeb7af3dae6617f75004e27fb99555812b2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a27feacc-86cf-4996-914e-d82de9dc3fb7.json and https://artists.proofprofile.net/proofs/artist/a27feacc-86cf-4996-914e-d82de9dc3fb7.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 0x74dfa6e12abb2a6c625c88e4f5acb9826520e9dc998178227eb455b8397c1e9f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES72302802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb09f56e7a72e98682cdf113b962e0bbb82f6b5bdf11dab09dc6729959cbc7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2307083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4bf613193c52f5c07c1afffd8e52a42a099713835cccbf9932b76e43d0732. 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/QZWFP2333490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a28153c0a719c72f88cdf34e124b51aafd0db7584f5e65e00d9a4f4f728b32. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZANL1779246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29942ef7f9649948c807ca0d883214a5ecfed807daaea6009f96159b4340ecd7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP42192003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc838458a89f7bdbd3d2d497481fea4b80eae9835cf65ba05e5eb7e9ea963e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00177de02443bfd0b1c67e0e50f4abae29c3088f260d471c71a650839fd8dddf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62114277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fce9d58ed90a7a642dff394dad24a65e78bac167be9e223bff7ca3d2314175. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWU2125152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3cb3880d051601974d26adc617f78d7631ac2f6f709cb37c6d532831fcf2b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN81928998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35b778813f2c5375c12f009a69a24fc468eaca1f2d69b6ccdf9587e72f6706. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN81929000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec2a21940613b9821497485cc3a33f8399999efeebefcc2ad5a2421d8e2653. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN81929001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c6a4e8f9662fc6cd7050c1f34e36b8208f885a9193be13e1c1e4f8363e192. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWT2494896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a4bf613193c52f5c07c1afffd8e52a42a099713835cccbf9932b76e43d0732. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZWFP2333490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643d1718564728bbfb6a1662ee63f1fff14d2e5a7949e7d395f88bf2ed3baf40. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYY2259893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c17125510b0d9a53a5034fcb4cf8e2603f60add02a5fddce2c74ad9b32e590. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZRP52106977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00177de02443bfd0b1c67e0e50f4abae29c3088f260d471c71a650839fd8dddf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES62114277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb5616f80d32eee3e4cc558ac073f410d62c0887108f7b8a90fb74054c31a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFN2461161.