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 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 0x4ec0c49a766ba5b6b8a2ad55fabcaed8562a44e5fcfc9388b5bc565015f46d75. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8daed915-0c58-4a4d-b500-00c4899e572a.json and https://artists.proofprofile.net/proofs/artist/8daed915-0c58-4a4d-b500-00c4899e572a.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 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 0x4bc58a48177c25a4cbe0dfe298bb4bc980a5e09baaecbeaefc7dae0d199a43c8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DKD5C2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab1fb56885ee27f4ad529137d4addb784299125ec60e9922856d16a122c295. 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/DKD5C2400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bdf62fbb7d30574106597fadf9c45e83dbdd8a9e153728819d4fe682558c11. 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/DKD5C2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd117c40510e1dfa79754724aef0d179710754b0d95e62240838a4148155939f5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKD5C2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac670f16ef349ea0bf678a3dfcfc2644598608050691ba3c527d6471b4615a5. 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/DKD5C2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a65d55934244c2cf9a1b659680fc51be3a6ea710d1ce3e604dd379b049d8db6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKD5C2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485a0c65819bcdb4c10d977308b0f7cb9b3980ce5d7f3edf1f26c55a25a626e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DKD5C2400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32e08864d6332c9ca554173f4d7628930962b96cdf54acdb7fc641a0c155f0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DKD5C2400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c951aacf7fe5baf7872cb1607e123ee7e3c549b9cdd502f607283db47a4667. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKD5C2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85188a62d96deecff4da4d2157652ce2124656c9d28da2a9b8b05d13d888696. 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/DKD5C2400605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b40f4ea5c58ee2e1be164ea24ae16b51f6e4f4fd0c5fc05c2e9f5033132686. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKD5C2400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7801c9c87aac60eae7ab6e10c3d450dc03885070e458c1ed32e7d81625d3346. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DKD5C2300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc58a48177c25a4cbe0dfe298bb4bc980a5e09baaecbeaefc7dae0d199a43c8. 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/DKD5C2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e5aff7dbc98008d034f92524003c6272cdb0ee9566778c950bac65144dae01. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKD5C2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bdf62fbb7d30574106597fadf9c45e83dbdd8a9e153728819d4fe682558c11. 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/DKD5C2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab1fb56885ee27f4ad529137d4addb784299125ec60e9922856d16a122c295. 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/DKD5C2400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d86bf73d12fe15ffe4321bac7edff8a81d6ba4a18b9afc72ab984a13164873. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DKD5C2500106.