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 0xb1610e6b28db2417cbbc9f1bfcf9a827acf3ceb0738046a334bcefd49d8dff4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c490fa8e-7054-43fe-92f8-14cb042b38df.json and https://artists.proofprofile.net/proofs/artist/c490fa8e-7054-43fe-92f8-14cb042b38df.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 0x8a51fed38ea51a7f4d0cae4d42fa158f3f0b33d1a5e6e7804da9bbad7cff75fc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:12Z), 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/TCAHD2387365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10cf8f72e4b370ce16de26850f9ca8d8b11e52aaa0eca15dbbacff068c60293. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGZ2380959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4466deb096d7e37305eea496192a64a9323727bc08debce0c02a3818b37b3eb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:35Z), 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/TCAHD2324071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76813f5fa86b4b20043da46d2b7932bff5369a877f3b04a462bf74a4bc5c6a59. 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/TCAHD2324035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b1a43e6228d30781d1aa16bde47fdb4b8b603f3f218c6277ed4379febb2d0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAHD2389667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65340f6d9e741f012d429f93f21325dd6c916dfec9c0a8d70e3ef204fe4c5909. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAHS2388787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e53186c8c8eac139629cf70bfaba3f31ec4a0ea35752819855766a17cfff5f2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:52Z), 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/TCAIC2449926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce128be88e994db89bda1df5a435accd40628c51eaaa7004c1c5166ea0eb25a1. 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/TCAIM2475619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94754d24ba31c84fd7cb0f02ded1a60c4aa60d3c7851a864d64a6edb64ea30. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAIP2467244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ea193f14e2bd77dcdfd3140eb11919530858137750cc7b7290a904adfa5c3e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCAIS2467265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9a403cd9b06af5023581424b60e1812bdfa5ed822fc04c354d574c67c0c9d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/RUAGT2445377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1659033cea69fa4a73a65be451f50e79abc835f61622df6a25693d1338c606e1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:37Z), 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/RUAH62416978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07341fa05a9c5ad36ce6dd3c9d48cbc4aebfbbd234e3109af8ee1a792fbf352. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/RUA6Y2510588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298fdda0d12ff286c1bbb8e54b0fd35997f83d25ec9af6166a493bbcb5bd971. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:41Z), 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/RUA6Y2526773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a824a30300773ddc34460e03eed3aa745422b6489b16607108336a117d55d7. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/RUA6Y2535077.