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 0x4bfae271bbb947c3d1d5afd979665dbadd9638a5a957eaa3c21a06bda34863b9. 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/1d30460f-60fb-4042-a275-c3d8ab3dcaf4.json and https://artists.proofprofile.net/proofs/artist/1d30460f-60fb-4042-a275-c3d8ab3dcaf4.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 0x0c7c2f5c974ac6da7507d537799706248f5d50a2437f0d62347859d9c914d87c. 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/GBKPL1512700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc7379fa49c7e5eaf99e0d32c05eb3511536c59c827f5edd4d4ecda1bef5d4. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/PTOFA1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be1c7ea7fa57328d09398c5c21627d0f1b23c9da2f2d92f50f8b56698adaaf0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PTOFA1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6f9d448032be364e6c5420ced32363bb0be10d4d8be99cc813b4bcbbb76a73. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PTOFA1800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3777ca126528bc48750b2e1b342fb8fe8b7441e1176cc38b433daa773e73d1be. 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/ES71G2018818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b551959c6b15071b4379a3902665aa87d642a2b1e9eedee1b162dec626440e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES71G2131992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e5d2b24b1c3eeea7f6cab511f93fb3945c055c91611ae2eab0d8ab9c448cce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:56Z), 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/PT7WA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6df134aa7baf592952f46eccce7a41f80384733aa1c5124265b8d436fca6088. 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/PT7WA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284dcf7e6a8ffada336513fe719d90c26493a9cbf9a44a19aa91c8e0df336d0. 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/ES71G2415620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712bcd28d6db7b3b6bec9ce85c3e2df2d1a4f35f64ccb273eb0e56904aa9efe4. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ES71G2221205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68998f6e0b233b9243c1e44d1ad59b4b278e521f022f30d5570a97c61c0f6f68. 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/ES71G2239975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b551959c6b15071b4379a3902665aa87d642a2b1e9eedee1b162dec626440e. 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/ES71G2131992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284dcf7e6a8ffada336513fe719d90c26493a9cbf9a44a19aa91c8e0df336d0. 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/ES71G2415620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd59245711fe217913d299fa3b17fc7111c27f94294929956abe8231e6f590ed. 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/ES71G2410626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710dd13344db39975462bb69ca9abf2405b6bc533eeded0e615ff4c59d6849ea. 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/ES71G2142117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6daad56a07018334016fd993201de1f429dd79c5fbf66c9c5626e5d282ae17. 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/PTOFA1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e9e605a51d144d4787bd549312524354142b03ce440f6259a3c08337c558ea. 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/BXPOL2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52852775210854146123205b8e708434cda082012461f63098f579c221336815. 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/PT8DW1900014.