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 0x3b9b4b050289dcd282b9c75d771983ff018a8001d113b5e597bc8793e354acad. 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/7f8a4e11-cdae-44d2-823a-b61d3a0b8deb.json and https://artists.proofprofile.net/proofs/artist/7f8a4e11-cdae-44d2-823a-b61d3a0b8deb.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 0xe34c132a527fcdfd0312ef9c5a90e7b86d547652d73d7ffb731b0118b2530c31. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GB7GV1480018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a39cca88197aebc212198d19f5a810b59546c4b5c54db1b53fdb87d278577. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GB7GV1480002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcc4aa87cdc663d69f9578ad6e7dfc26bf2541e59b59dffa56d0c66c2c6594b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GB7GV1480003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c60d7dd6e0d74b63a59260d1e4a148ebbb0bf2291a8afaf6ffaca97bdfd73. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB7GV1480005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fc55b096a5ad3600c2694ca4e807395611c0634851808c863f556999260b63. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GB7GV1480006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21df866c2513b3ee7ecff9998d7c35d606c2821338e3ddc2b7dd9f76746517. 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/GB7GV1480007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd73ac853935cddd7d06de0887e56ed0772afb2766d7d35e35edd9342d1ae44c. 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/GB7GV1480011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385f227d1a26d7d330046e78c9474ab81c34e96fae887fb2c78f671032407a54. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB7GV1521003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484dd1d5bb4d904686a4fa417480a29bcf00b7ad14dddeee004225379d486e00. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GB7GV1613001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7107b0d3d25f2888c0adb16b405d884156f5ac7bc096a6a7ee01242ed8b1c. 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/GB7GV2311130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2cc4dc66aa1c1dfa06dfaeeeca555b6a14ffd0d9c681f02ac1b28d458589b9. 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/GB7GV2311131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c50aae280a7209bc010de7f9a8706bc186ba1402f43249054ee8a4e9350862f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GB7GV2311132.
Grace - Sir LSG & The Bless Instrumental Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ab1203f39f33af1c637d05fa85897a86e6feb3f9a70b89c1a9f9896e28d5b. 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/GB7GV2311133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3e41c681c874acb57520e39c5a85a4148350571d67b39f7436beef6a3d2de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GB7GV1213010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cf12f5fc3c884ea765874075c524dd729c608378fe9be9297c9cb87554313. 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/GB7GV1213004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc797ba9e114f187813311ad277cf35c6417635c650f7e6e6362ea33b75a70b6. 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/GB7GV1213008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7a06d1be1e117a68b0fa6cd71155eb6c447c08fb6c0bc332966dabc1c76e3. 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/GB7GV1480016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1688c02e3d84a97dcac051c5c19695fe441696f3d939ed8e2bdc6565000a9cf1. 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/GBLV61616894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990143fc44394e869d9b1e6eb846d03c56cbe0a633c75dac378473890fbd074. 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/ZAWT21600001.