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 0xb85a794caa6c226813228541c3b300b6ef58f61f3c86ff0508dc717ae7cfe6c1. Chain 2 (Bitcoin): anchored in block 953980 (2026-06-16T17:16:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c38318c-e1ed-43dc-9022-9681cca168c7.json and https://artists.proofprofile.net/proofs/artist/2c38318c-e1ed-43dc-9022-9681cca168c7.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 0x77467f988096f942eedf46db33303276d233bc98cb67a579e0a33bd9ff6f31cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDE2397403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a494f0a107dea6338921ef58182f7da310c54661f02a70018044541e298290d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDE2397466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d26cf8905bbb9bf1fcbb4af4298e611ba423069ac3a2284389f36237caa8ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDE2397447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67eac2b46d22ff15c985d59c96f268d1feb4af7fad64178512587d3937b6b4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2397478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e45f9aeb89078a59cbd7f91edc7b4109a4b07bbb2cf8273b25e89c99fcd91b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2397420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e7ae12a9e0797b646b81066fa636cab52e0517fd4f116c3b31bd6871baa7f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2397440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64579f359b78e4b3153fd49ed61dbd62a6ca00027d59281564a04978f1a51962. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDE2397493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4270186fb86734b38188c3475e8661ab864c442e8440f4dd69b88ae69f979a0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2503291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc422e7a0bc3fbdf89295c441804864db3a8c7f41253c173988235a7ce1d6d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2503292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777f764a3222510b57f22270bb9f752e401050a0e941e2c580cc40a983b7a55. 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/QZNJV2503290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac5fa3d9ed12380e4fbbadae672419bb772839f716b347d34e00650569d5125. 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/QZNJV2503293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6401b44f4f6bc98b394e63f12be1f91b507b2fe4844d7a2f62424c4bf8ad483e. 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/QZNJV2503294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9dddb939f4629c15ccc7bb31f6f6b9122b386c0f7b29515f15722ec01e3889. 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/QZNJV2503295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1fb3a39df1bdbd30ddbe754677a769f67be2bbadbe8a053ed3a196928534c. 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/QZNJV2503296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ed167b56196784819a6df5eefe7871ec92a7265685bd4e1b5de878239287e5. 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/QZNJV2503297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da7c13d529698082a1e21f075583ff76407233183ba9176bcec72273c2cb735. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJV2503298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb231b45c3c38eb67510bf73a163ff24bb24492e05f9eecc2a9cec1304ef01cf4. 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/QZNJV2503299.