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 0x57b4f0a9ba35d5ee0b770854f48a72d2699e4bbb9f3534a496069f3bb29669a0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46e7f548-4e46-4e0d-8d6c-93b4739059cd.json and https://artists.proofprofile.net/proofs/artist/46e7f548-4e46-4e0d-8d6c-93b4739059cd.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 0xbf7cca7c30e4659fee08bea1eec7eb59c0fc4946a174a11d5a49c4c05df4a308. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBS5E1100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e6e3e3bd82a3f243b1b0628827f494e126caa72625387aed01b2e7579f73bc. 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/GBS5E1100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b4041efc7e1006d7f1f793c0066ac85d3a7164265e82dd84186d4bf933b05. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/GBS5E1100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc44ec2def32ff46d442475475e979b2a71322a6f9c904b29a2f7badc570b6. 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/GB2LD1900527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb8b1e0165343e2d39edcf841203ca8841157b7817013a3c39c620c49501d21. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GB2LD1900528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91812a375acf649dc327e54db0ad4ac0d878925823d41a882ca131594b32a802. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:10Z), 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/GB2LD1900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a764678db1eb1f1dd39784d0d01de933036b87a5cbff90bd7b6eaee98d9ebe9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB2LD1900531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1905f70a8736d0373c51dfef42dc476fb99609376dc1c92b72afae65243af. 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/USLZJ2368044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65233d76efc403daf25b15289511da9b8128f9a68561c6b8f00b0c56c88c551. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:40Z), 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/GBS5E1100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232237a56a28919968014fc8ede929fbab8b4cf633c45db51d8add97c7930bce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBS5E1100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736d2624d936f0ba934f974f6c08284119a70da85b4e89f7a9787a94b72829b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDE2592001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a2f10da105ea58ee1811d6273174a9eaa330a9bc98dfae62003c5c44b20ae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKACT2520548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e193915fbc821b9682cda33406209606255bcfbf5a6b957770074b2f34cfe. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBS5E1100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5ed409151e65e97eeac68a8c147b1d6e711d54e42a16a28284a538dc813d0. 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/GBS5E1100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c3667dfe3431ddadfea972859c3d7470e72f1bb2d45093cab97d308177d5c. 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/NLCK42229798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f11725439d3439a4e0f3abe448262045ea91f8fe9c98d8e0f791012056294. 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/CA5KR2191426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc809fd2f5808d02c8ed8f8ee06e067f64df9bf9f22540c293735c6ab96e7f63e. 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/QM7282464932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0d5b64fe8697eb273cf682c1cf974e1e69809277026c425be3a4040398fdb7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S1802721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c4470bd3801c8ca9954bf332af07724171675262855371760c42f0687d4b57. 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/QZMHM2559342.