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 0x3bf517f2ae141034b8ce773928ac6519147bddfb0a711b2ae905037ccbfd2d6b. 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/d650776d-d43d-424c-972d-fd9f8d66095a.json and https://artists.proofprofile.net/proofs/artist/d650776d-d43d-424c-972d-fd9f8d66095a.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 0xdc627255f127eeeaab172e91982e63ceb53ba51b985764b5acaffff970bf0e8c. 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/FRR642301713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6385a0e7175325f0e570cf81cd8caa49a25d9607d2ac1a6110c3d82cedf89b4. 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/FRR642301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4088184b63cc66fb23790c72944a065ece3083fcb2e99f25d5a8b3d3ccdf972. 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/FRR642301715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8821c93393e0f9c80116a6e38179a950a31cc7a78ab43601e86d1b70859f6e1c. 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/FRR642301716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b5886a74222b3d924eaa9f1986af6d2066e2fd8e543beb07a4e7c96303a7e. 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/FRR642301717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69378631292006b565c1f8f2f88f9f279ab8338854ba3fa1777c8e088916718. 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/FRR642301718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d61608b588ca6ec825dda6bfbcbb3646f806f5882187b687edc54afb4576c. 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/FRR642301719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bbd559beacfdc9cd4c3893c9ffe1ac03550b19505870d4fbb9edb7726dc8af. 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/FRR642301720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cbf83d47d86078dbc9e355e79f9faaf80c38b07e58dd7991182ffe10c6471f. 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/FRR642301721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949bd09dc7bc7a84aa8ffb2d2eb02db1ed50b426369379aa86a74b59e2ba2502. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRR642301722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9280c09040e4a532d8e63b967596f0318f8628e28cb26d8ae746ebd12f7e72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR5R00912669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20caa0c9ba002700765179c90551f00d226ea2811ee6492f441fc56b5db72736. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR5R00912670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0eca79633840874ebdff3a877e0c3de732d39369a0d7d1979ef9508e729c7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR5R00912694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a7f16220abb94a5392a6ce984f7dba716dfaf5e4bc69704ad2d339ccdb33a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR5R00912672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bf36530c3229e8693755c45a3d60262d500817a3e10726ca37f1d2ddfba1d9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR5R00912674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262f5a64a1e5119c5dc3f136a32de5b7132637089b95443bfff552168bdb691. 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/FR5R00912675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96036f1ef4f98bbcce6ef8e774986d94efce17c293edfbba69af414ae923f5cc. 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/FR5R00912678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b5886a74222b3d924eaa9f1986af6d2066e2fd8e543beb07a4e7c96303a7e. 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/FRR642301717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4088184b63cc66fb23790c72944a065ece3083fcb2e99f25d5a8b3d3ccdf972. 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/FRR642301715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6385a0e7175325f0e570cf81cd8caa49a25d9607d2ac1a6110c3d82cedf89b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRR642301714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bbd559beacfdc9cd4c3893c9ffe1ac03550b19505870d4fbb9edb7726dc8af. 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/FRR642301720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c98c699d5d525f7bd52a39329584fc459d791fdbd1ec9d1fceeec45d35248f. 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/CH6541631382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941a4574f8d8dbfb0ac2ed7db0b762599ea8f3411e2dff7eeb82c06ed848eb37. 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/CH6541631383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddb0fad9b3e84ee5ae375ce75265d5f8ba3263ed8231247841f484dfb41250a. 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/QZFZ41946317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1307655e366d190b5cfa5e15f3a427610feb31d43c5a993b39be2cb8ab89a14. 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/QZFZ41946318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b3e99aea9e7f75c3951688cd82fc8f2415af2600e7fdf0b673c16659cbbe24. 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/QZFZ41946319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9280c09040e4a532d8e63b967596f0318f8628e28cb26d8ae746ebd12f7e72. 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/FR5R00912669.