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 0xb7a72b9555c8028c6b4f6efb4535c55332d579025536cb65933e5704ede6bd7a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad5fdd16-a351-4284-b9dd-5fb76d0a8863.json and https://artists.proofprofile.net/proofs/artist/ad5fdd16-a351-4284-b9dd-5fb76d0a8863.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 0x81cce98709bef03e8e7b5fb021d6a80e818528da00e24402c4f14292a9ecb3ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES92353456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f02ddea333d93d6036532f71d3b66700b778e76a6a8a19e8a7a2a6345f51f6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZES92353459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab847d45abbbef3bb57c91fdb2add8727ca9f5cc5f7e839bd08e01a05e979473. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:30:59Z), 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/QZES92353462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3821eaef1bdb284f184fbe73d14d55f5d150b6958d0f63266bd229cc5829b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:51Z), 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/QZES92353465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d43c92209aede6b8ecf71ffd128b8310b788b411fb9a2c3ef48bbbfeb314f12. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZES92353470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68312f4046abb2274296683b2f1dfef3323e92403347f742dd7063b82eb9d8b1. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:53:24Z), 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/QZFZ72409980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6684dd4769870f38ba792531b66d39fd5c22f08a7ca244a6ff7e68a1582189. 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/QZFZ72409981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353080e00c634c2239056f3f4eba732d788b5e4ffe4bed23ae02d4a4372eba8e. 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/QZFZ72409982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8611b8a9aea1759d087dc68ef9a4a7f2d3243ef2ae5cd601e8071f50d84003. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZFZ72409986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d4c4e1dd9ea3826d5ce1a380e6f7e4396787ee41c88e7a1a74c19decdfb5a7. 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/QZFZ72409987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9255f956cad74cea2dc94498230ac514b40c7d3df21c5b0143066e1c1b1823af. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ72409989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c0604fb06aafc31a4458303dd0c9927fd5f3b6a3d8ca79268fd08aa6d21420. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ72409990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcd33d4a1ff27db47ab5a3b9795cb9c39bce492a7f7b83d074013a2d043a6cc. 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/QZFZ72409991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43134a361c7a1df6c4a56e539b0d9d2d4d60b0b044f985a240d7abd27dfac1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:48Z), 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/QZFZ72409992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c16b66f1cb97e793fa963c933529c3dfe432713591557b13d8e159d71d1734. 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/QZFZ72409993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00da2b72ebf0c4b063db18c7b8606f32b4a7653a91ecaa02545461dc6943b2c8. 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/QZFZ72409994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e2aafe3e0611844ebd55c9b021671d5dd249a7d941e0aa990f8bc1d415d782. 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/QZFZ72409995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e7dc17f8fd1b0faee8afb7f8373577cb3a54d286777e70b1a1fb1600771a0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFZ72409997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b039d1d1f67c221a536464bad7772de9ecee93b91d9b9928ffc191e9337cddd. 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/QZFZ72409998.