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 0xda626c5572054a013e1544871e89d78ce6580052f6edf7974b3d0ff1c18fff79. 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/ab7bd397-c503-45cb-b078-d36d88657eef.json and https://artists.proofprofile.net/proofs/artist/ab7bd397-c503-45cb-b078-d36d88657eef.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 0x0bc6d0622e521d62e659782506190fb41cd0e1b97070c4211dfdae3c2a43e81d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLRU91877001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea40501d3e91475ca1da0e0fadb9ea1aca13376a38850b71a0d8c1b279d12e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:55Z), 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/NLRU91877003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32212bc7ae7131b1d42929d27e4b604506e5749bb34fd08373c3ea0e5c1cff8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:26Z), 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/NLRU91877005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f0bd72deee898cd5d041a093d9405defe9af092d088763f4eab269a0d128b9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/NLRU91877006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f68ea2fb05e90b06e44f3f3f10f03bdf15496653c68f36a54efac27ef08286c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLRU91877007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f7a5dbdf4fb72fbdfbc66d2b901af3b3206aacd535b06edbceb7f0c0614f2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:20Z), 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/NLRU91877008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94abc380e4a83a0076d53041d3ca5513120131f3e72ab45b2039e244ea664bab. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/NLRU91877009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b96061e6c9249a9de9af054746670240195879b08c4988477c967fdf084ffb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/NLRU91877010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ca256495e99a2a1c2c0fd38dea6cdb40756ff0bdcd03337ef497b77763c2a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRU91877012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198fdcb95b6be68af96337d57ad1e4848a3dc56d3c12782dce5dc3b109643a6a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLRU91877015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe40fe9ee9a4e59142fd046c7c9f0fdbb2b2aaec1b745b43dda9ab2a79f1485. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:49:58Z), 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/NLRU91877016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab1a8f214b2f0b164ddac76ef95fef9f461eb68abfd37a784dc729d52a56559. 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/NLMM21700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40db850cade071fdcc5f7f18245bc1e03ade879ee1c7fb623ddfd237abf306. 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/QMBZ92273812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40db850cade071fdcc5f7f18245bc1e03ade879ee1c7fb623ddfd237abf306. 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/QMBZ92273812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a08b9a62fd0a884398f58128be80cec6eaa621d4aab7132dacba12d042a165. 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/DEQ121749328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a08b9a62fd0a884398f58128be80cec6eaa621d4aab7132dacba12d042a165. 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/DEQ121749328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d8aa786cef4346fd36d99f89e063023ddb0f4b192fb697435cbdd8fb783474. 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/TCAFH2019871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17481ec5dc9aa2ae4666ba740d9d631e017b37d17222d468016f27631256ea2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG661701037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xababe524a20a9dc9fa0b43279eceee2a4545c01b707c3de007e03dedfbc8fc7f. 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/NLG661400704.