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 0xb4863776d8a66a0afdb1c0ef52103859c1df439f9ffc2beb979e4f26eea1d2ed. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e436340b-1241-49a3-bcbd-1e4e05b6da0f.json and https://artists.proofprofile.net/proofs/artist/e436340b-1241-49a3-bcbd-1e4e05b6da0f.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 0x485a4844e9bba49f3f670268f29db32e4a031445f0b478a320d9f53dc46268a4. 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/NZRI12102459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1111d1456d1bbfa8565e7e3a2c7efbeb5adc0d4b2cb9036fde631b4c81df11f8. 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/NZRI12102465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c790e3953b7aafffaef801c8e4beaa3be6f4a1b64c5b004065a48b0b7ecdb31. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/NZRI12102378.
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 0xdadfb1f60348b1600ee19a68196e45977248477189cbdddac05387f4ca2f17fe. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NZRI12102462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155421fdfbc038b4e64ad0697c291ea284bb797e86ddd4a25d39a92023edbbb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NZRI12102464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae05a863dfdb14385360a7cb3d0494277f7bdef7b029840337418c6c8be15f6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NZAM02001414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab04e352c03e15160725ccd947a7b1ff278536eaeefb2d8bc31e8b84213153. 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/NZAM02001415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c191e7df125d72486f5fd6857a25b118031873292850dd603e59f31079b3d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NZAM02001417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085cde10c55ead4e2db119639d07f9c46f656e1e04976ece05a690e4a5bc3180. 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/NZAM02001421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0ad527b70374d6568885416fae3594fff0d3e2453ca5fb36cb0603680b6208. 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/NZAM02001422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db069ceaa42cacc217d879fb9acc5b16f1e31b8312991464f14f7e1ddf0a4a. 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/NZAM02001424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2eae3a9976c5f16e7532be8421be75fd4f7327af765bac9faca228f1a343ad. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NZAM02001411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca9e664a03e7e90549e4a5b55fbb2cc4d2924ad33a47e3c7fe71ed36d5c1d3. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NZAM02001419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1e1831b3bdfb1aac756e5ba807c02653383967513437da7d2b754630082dd3. 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/QMDA72483828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cadc734822d66bb05e15ddfe5ffadb9593b1329a7e16e51ff4fe51b5ab44af. 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/NZAM02224249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9597cd3a44a7ef71d374ffd99649f375dffbc26d65455d1d8e2e25096aaf2c. 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/NZAM01903501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd553f6f3956c8b6e44ec62aec99a6eea1ca098b04520dceb086da2214312316. 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/NZAM01903502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c7a2a32155ac8009196c7c8521ae0d1220ce306de02d1fec518ba1df9bfcb. 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/NZAM02000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc6856e1292ea0d5dc9d4f23cc7980bfa0a9d83ec4d5ab0ac8f9a92eff8e945. 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/NZAM01903504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aae4e087c233cd266ece3094bc7cac22695656b34cef18d9f8899421fb3fa4. 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/NZAM01903505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1970c3d19aa3ee92f48744bbc4e268f563178a1cb7e5d951cce08765a3467a66. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NZAM01903506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4630132f70313e0033979527a02c58e419c4680f86bd3871e05dcbd14e67d2c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NZAM01902797.