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 0xf28b93acb455c5d55b8e834b83a237bdcf852693d950d8ccbad90a0e16361dca. 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/c90a85e7-5640-438a-8cac-0ed30de22fea.json and https://artists.proofprofile.net/proofs/artist/c90a85e7-5640-438a-8cac-0ed30de22fea.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 0xe4e7d808fc345267c37a795226348b41ca25cf74ac313186428ace0415a6084a. 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/BRQK11400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8811390c3df85deafc375ed5b52d90c17fc293607355b75b7493acfc0a1cff25. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRQK11400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20109324517876027d8f0a98dfb7eb207ce9d42f7ab3d3090b9feab4f9b1c6cb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BRQK11400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52357bda067c3c5d92a11bbd5636d6c1e36615f1c0e533a7d5413d33b5bce76. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:43Z), 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/BRQK11400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede596bebdcfeb7edc1b39cea9a67cdac54c490a31683a8f385496848736e67c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BRQK11400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57121875d4074cdcc6cfbacfdf9380ea1e8b6ec112a48e16697bb9768fe9b888. 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/BRQK11400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5206ce63c0e913c49815bffe9b00b5a230c83849884857ea73ed26aee1a4148b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BRQK11400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91dfb686607643db76ccfe9e715a77cd304e71d217c80506ad2ddecc13482ea. 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/BRQK11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667d237e7d236360556d758284cf981fb33f0d59c9aa8f37199012b5aec12eb0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRQK11800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c76b79f9d47aa296648c9cc7faa249a661bbef2e9b408ae9f6ced8766d7148. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRQK11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d527274d24820822be19ecf971e1da35acea9bcb45e07f182bf2e5912e32f9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRQK11900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91036527b23f4e5a8132dde46b774922244d35f2b89b8da7b394e84168a69f58. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BRQK11900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66644ce86c957dae6f4a79c1962fe2d211b122fa1071c74ad58c6643fafc2bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXS4K2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2578fd11e773b79416025dc6fb613d28ba1ab592b4b7e13a9635b30e359c79. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BXS4K2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b06e66ec4f60927e9f5e9691f4c4080c1ff117af40bb36383fdb750a2d88b4. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/BXS4K2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337488e294ea8460f0be04cdfa77229af92009c52ccada5c943d809cf57a482e. 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/BXS4K2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e6406951fc40af9bd45f0f164f4042d92804679cb251181a52268028d24f1. 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/BXS4K2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4f0c9d7179042a62fbef10cfab0dc1006e34c64993c80d059b5d3066cb670f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:51Z), 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/BXS4K2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337488e294ea8460f0be04cdfa77229af92009c52ccada5c943d809cf57a482e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXS4K2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81419b38e24af71393d73566553a6069cd383cd5242ea47f71f877f338ea2e86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BXS4K2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c198321a5affd43f5e0cbc4f28123bc7e2ce181ad06d6bb7d70669b43ccf8f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXS4K2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d222ff8d91b7d5669f42e00086f77f75a9bd1dddb2078b4ce8a3a16efcc0bc9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:05:36Z), 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/BXS4K2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428a65ed1a3e782e910b8cc3646ab58481e306abbe93bb8b3a9e10dff5c08b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRQK11400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7d808fc345267c37a795226348b41ca25cf74ac313186428ace0415a6084a. 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/BRQK11400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8811390c3df85deafc375ed5b52d90c17fc293607355b75b7493acfc0a1cff25. 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/BRQK11400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428a65ed1a3e782e910b8cc3646ab58481e306abbe93bb8b3a9e10dff5c08b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRQK11400016.