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 0x037e404921a9b7b8a0410b0e4f2db07a405ade73077f0955e7b24f1ebf55c337. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5908b06f-073c-417a-a240-6e8ea4329930.json and https://artists.proofprofile.net/proofs/artist/5908b06f-073c-417a-a240-6e8ea4329930.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 0x15fd2ecbe95e0a844265c17485844e3dd9eda05539f14d25ce1845b84348ab52. 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/QZHN32390841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5140576ac5f34c7f37251f4d4ecb6f63ce18363944806028009632ea6246b714. 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/QZHN32390844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a0fbc3fde006a1adbe894f6fc6fa5da0da95a54b5645c10e87e39bbd63d98. 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/QZHN32390847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85ec876011aa27c03efc6cab7b5eaa82b9b0c853d9dd174b9ba6f38b18b559. 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/QZHN32390857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb44072904c021c968caeee935e83034eb07e6295f86e1202c48702471f1a610. 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/QZHN32390858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ebcb4dadb6060c2961c54df53db3bb2ad4bba91c9a429e33282fb5b3d2e91. 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/QZHN32390859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102142c992bdb4dcd890a23fa79ab82f09c00926777f077ed97bc0c296ababa0. 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/QZHN32390861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3ac4f2f88b59642b001d70f88a56193d781063e634eb1a115dbd5e71587f6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN32390839.
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 0x4be010628d5cc48f323b7f103378c6331be0f84f773a11f7e36e42ef8830dc3b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHN32390840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdb1fab4b0eed44ebcb563f59dd77a2662bb3a9d756db8c340e8531d5145b9a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN32390842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ebbb902ad587e6bbcd691c961b60830b482eada4aacaf602259b0a3ab1ee6a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN32390843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20268a84147f65181216b1cb6561a411c49d612130dc4b9d71aab5c49233428. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN32390845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae7d9dad70e9c25f2d9b0495a33ea8ebfd1635ab3a4e5d1d3a0d9040854617. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHN32390848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0f852c713ce9adf83d6c4bbb1518c513f5866199a27b1174d203560236c7e2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN32390850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9dc685a1ac10cc1d1417fcb59d0119b38bafeaf6988c196d1574bc66c191ba. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN32390854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbbbf0980849a0eedaf1bfede08fa5730d4d109982366deb486e483ad62bbe3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHN32390855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ea3dd7eb0ada1ebe95fb7788af0cd98c5cf627f427e036adcd2cfcb00856f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN32390860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b018914baf7c119db3430ef1c5667522af1d583e32cbb774ce45d736c0edd7. 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/QZTPX2220530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747cc3c0ce72a87562e2735cd68b30d8cdd7c6f1e87ea653b377e6d3bc3ea08. 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/QZNJZ2113671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439046aedb283b4ff60e9ddcf3845d7330115cc69dd3662574e3f59b53438b9c. 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/QZNJZ2113559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5882d496d716f88623a1d06023510d53be0836d41dc5e75defb143a716b6f95a. 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/NLDP10800286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7da82f05179610eb2a6d080ffa9f06cd3d4ba27a2a9afaae9b82fe8c107e3. 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/USCGJ1857665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f85b58766109de89eb2c5c8576ce0df585a63c3ed575e6bbf16eb00fd0a5043. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLDP10800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea1998dfd7e043a183cb4e8724b94f73755a46697e3df00e5fbc96b1bed270. 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/QZWFR2373570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b396e24e36f8c30196364dcc569388616a20ef1bb9669e195a7dab4f895cc. 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/QZWFR2373573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c0ad6f5aefc5110b61b3c74acaf185d16e6f28313de8c5256786984fdcf04. 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/QZWFR2373577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6a571ad55e2ab06d67b38d9e0be953dcdc92a60ad786bdb4f397bd0b5abad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWFR2373575.