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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301b98e135aa7ad96a44f0b3d13a172e297c45fd10e2b089e0b44ae39814798. 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/1530d9ab-04eb-4506-be27-81934cc542db.json and https://artists.proofprofile.net/proofs/artist/1530d9ab-04eb-4506-be27-81934cc542db.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d80b5cf3a03a2a433d2c06f7bebee926780c13b230d61ac0c34034e2a193f8. 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/SEYXC1003503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28162c7ec9885d48a68d480f403dcb9744dd3a09f199276a47b3fce7f1c1e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYXC1003504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4ed9baea5e64045c5a9da071b9eed5b2faa89694d207430b85045ab3933c7c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/SEYXC1003511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c392ab5e3502c7e4ea8716272acbada43ba3381590dd8599f6cedcdb2495f. 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/SEYXC1003513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e20dcbade09800b435f203903b6ef815fdd8d493418c813ee2048883a703053. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEYXC1003520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b5e51d31b8fa6d3a7bebff79b03229b0be2c96567b21db1b000121fb0d2c9d. 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/SEYOK1012145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20972e22b7c7e711a0b7d21d09d7d4de071cc467195cb4e41e0bcab87efa5532. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK1012097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5987229457d55e12a65b45676a012b14ba2e4365a8a31517dec975781bfff35. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SEYOK1012098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6ec8a06131c82a90a822d184b66f2e9df2d74c0911974cda6606f7364822f1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEYOK1012129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f071da270dcb0821984c79733a9df1525ed1bf5d85bbb622c1c5f7e5fdb9b61. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEYOK1012131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1974d911246071765e8be3f6f887902c5af70c2f3c2cc0b6d7c6f06ea2390a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK1012125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00f5d1e1e497b3943153c3f637a45d118100a6a5d65a6f768b17dad3367c3c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSMU1819190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431d9491787abc185d8c031da6bce4b031249da3c9f00f9a3d7ef2b1c270b05f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBSMU1819194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00f5d1e1e497b3943153c3f637a45d118100a6a5d65a6f768b17dad3367c3c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBSMU1819190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185aab11a2d7ec8755937f0c82fcf975237f4bee100d50685eeaf0c0fa596079. 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/GBSMU1819192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431d9491787abc185d8c031da6bce4b031249da3c9f00f9a3d7ef2b1c270b05f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU1819194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf48af789cad28d20eb16c984d5dcb5a7d780d03f46453551c1e4707fbcd2a1. 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/GBSMU1819197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1845958c2f7c8d7e30af53bb10a98ef831f10b78a9ca59a116c586f24364251. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBSMU5116464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71f24fe4f788b6005d0b77639a183ff85ca3cf06d814f1dde0651302b93ce1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2027560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64e66ac0264822f1362cfb4a789ce45be7821321fc7c5788b68998d270e9219. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK2041902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42733763f843289925f50d4e853f2112d0f8c9ee20bb34f16e94496cdcfbdbf5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SEYOK2041904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd047cafd1dfbeac2315369ac32b46f2393ad0eb13b44c979656aa17ce1fa1faa. 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/SEYOK2041908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843902f5b187047b6c93aa73f0189992c6e062c69e81274505b46c5a2ca3c674. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEVFZ1919101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbeccf86c8874c6890a49f1c8d41a9dcecdea6b6e48934f0604d85fb30917d14. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SEVFZ1919201.