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 0x50f690bdd5f9f909982f2632d942f2ddc14fbe27b7991a92f9177c3ca34ee120. 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/42e9656c-d8b8-49a1-b050-11255113dd76.json and https://artists.proofprofile.net/proofs/artist/42e9656c-d8b8-49a1-b050-11255113dd76.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 0x10c27fa54eff1f688784d1f1b1a1e1f17ff5ed704c459bc48ffbfe38ff84d2f1. 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/NLA270700473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c2a119452f6ddfc6a8d98209e79913d57d22a0764e216296af2a07f10e4b0. 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/NLA270700431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd94104e792f31307ab25b08f1c595e76721d9365e5223dfefb1f53dc31f563. 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/NLA270700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa687ee1d3077057ad379b318743dd852d95b89709a20eb5f1b670817452f2e5. 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/NLQ271700322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4826d5dccd7d36abd8ded5a630bb42af401c66654fa7ba195a91946ed67e3154. 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/NLA270700467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbdc15fab8188a3ced5c55a4430bcccd86827b714e6e615e81f6297491923bc. 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/NLA270700427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a6d85e6975bb539726cdee52ab71065fc7ee3121a12d13acb9058cc49f26b. 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/NLQ270700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522d2b99b37f98f919cf1e829a5d55346e32a5d114391d5c88d9d06f14f530f. 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/NLA270700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010ecfa4501b59df6ea57358e5bb25230a6dbc41c0993a889c25ef030647fe06. 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/NLA270700460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7f508a7e79fb9d5c2de720c9334e13080ef038fa0a70be4a2ba9695fe72b0. 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/NLA270700465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210f7a435773e2b61eaa9c4befcd632edf94ef1cfa2c4f0e5aadfb79b3ee26a. 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/NLA270700456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd4937eda33f7d2a3a25455f6f62c6bf62da3689ed65c82232fa9c8f13151d2. 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/NLA270700458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9195b1289608d6c992ab194dc60648a84cb1c6e8e12b1233232de878e139c4. 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/NLA270700463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e9fbee364ad37a10847a1617e7e1bf4a6c10c328c6c618c6dc8a019af54cf. 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/NLA270700481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96d34fe57a80edf48a2a96993f022af1de34fd00eefd21e33b72efdedd39aaa. 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/NLS242400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d23544537266246ce7bc90436555241566ecb19e3fbfcfbf75f886006c5cc91. 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/NLD450600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522d2b99b37f98f919cf1e829a5d55346e32a5d114391d5c88d9d06f14f530f. 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/NLA270700462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed14451c64e20fdb5d5294b1dca458948c77095658b850d8e8d042cef61d4d0. 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/NLA278800734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e694755022570e228c1f7cf3ca6922eef0218203ba7cb4b6c051b452d1ce7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLA270510684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47846126570d45f257ac9cec7ec3e6175aa3c0dece2a570344b4d78849f5668. 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/NLA279300890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5f0b503f51e6e4e55f3aad2be04cc9b6da65dd89487d8416bde825a8a01c4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLA279900385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaf2c28a96aa3a9d1bfb88932551a05114fc617476bf94aa4d8278145dc216a. 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/NLA279100782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa53246a9bd59c4b70bfa617e6aebdfc9d494e79760a292e2a8b191334e80c. 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/NLA270510673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0dced7e335c4161c1bcc6dbf688674e7f6c6ae07e6ab7436ab5cb6a0f5004. 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/NLA270500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e240d6c9db03727993a7100d9cacc5406b3b88f6c3bb95da108e2011ab217d6. 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/NLA278800745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3236c3f5c4725923dd7febe7b3ce379baa12d9091321636f691b6b03ca793bf. 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/NLA279300886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dbce57d3d4815f6bc6dac1f06afaabca7b31edd70c9a884089b33e6fa3858b. 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/NLA278200506.