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 0x9133ad9c4db2fa54fa9b51df7d03e102642914dc4c7282a49755ef794512ff46. 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/2e42d8eb-1dc8-4c29-bc26-27bf2828bfdf.json and https://artists.proofprofile.net/proofs/artist/2e42d8eb-1dc8-4c29-bc26-27bf2828bfdf.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 0xe23dca38b32812a3bca5930f4edb383e4b4c9d461f2e41887fe84249c7dda28a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6K2139580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbcbcfac3e5156bede948bd1ce4ba51cdb9bd997c9449cddc9464b8f5c3ff5. 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/FRX452280321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbbcae388c7e595827cf4eb56f85126f8002a737824d21c2b080091c33eed7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX452280318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614f955aa99d669044ae391c2aa347294976137c79162c144e24828b953f743. 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/FRX452280319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b209f47230a2b42cd7f3746f9960b5ca054ddae934daeeb215a5e4dbe478dc. 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/QZMEM2208050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbcbcfac3e5156bede948bd1ce4ba51cdb9bd997c9449cddc9464b8f5c3ff5. 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/FRX452280321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b20b700b5171b38961a5c19ef924f50b5917072bd3baf4b46fd313e2b566bf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX452280322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbbcae388c7e595827cf4eb56f85126f8002a737824d21c2b080091c33eed7a. 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/FRX452280318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614f955aa99d669044ae391c2aa347294976137c79162c144e24828b953f743. 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/FRX452280319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b209f47230a2b42cd7f3746f9960b5ca054ddae934daeeb215a5e4dbe478dc. 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/QZMEM2208050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffbcbcfac3e5156bede948bd1ce4ba51cdb9bd997c9449cddc9464b8f5c3ff5. 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/FRX452280321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b20b700b5171b38961a5c19ef924f50b5917072bd3baf4b46fd313e2b566bf. 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/FRX452280322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50c8ea3c2d568c86193e796411a8e696bb65e2185f11dd8d63599f2207886d. 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/DGA062382187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b8853b480f0a99c1e9c15c7645c667297a5272833babdc9dedd9bb73f9a96. 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/DGA062382188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f6b9968666a73435cfbb28f7751eaa418bd25b58e157cd42f8c8496e3bee8e. 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/DGA062382193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26190dd45f26802060f5a5bfce96b60ee19ec01913e87cd96c4ff4c074e2734e. 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/FRX452429767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46feed9a69d75d379e58931841715f964c419fcce59de5c2b5094e46591eef41. 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/FRX452429764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6090e810890558b5bf020837d20833022f5df535a397342c98ee83c7e1620fb. 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/FRX452429765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e61b4a48e8fd033b0256c6b5c0c0802428dd741eda080f93efc1093d23a79. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX452429766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b6cad3cfa3b805d05a47d36bd079c92b4ad00b4353658217a7bf5371c53a3. 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/DGA0Q2483159.