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 0x651ab3c5ecc355f7d9845685e7f4865b3f8c786b35a885e250ad9ef3ac1e2ffd. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e15e459c-50ec-4755-985c-37cbf5eba6dc.json and https://artists.proofprofile.net/proofs/artist/e15e459c-50ec-4755-985c-37cbf5eba6dc.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 0x03bc1b82d4b0777e725c7abf46da27b4e7bb513c53afddca99a5823cad5e5374. 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/NOBRS2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6775b257ff110722a19fac35790974d8fc18f034519608f9264a8979b1eff5f5. 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/NOBRS2101050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef38ed62189708504a690ee2d37e7e65ea0984750cde1d186cfa2e113ae66c7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NOBRS2101010.
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 0xa9c6e18a9aad80044a2160e5281223348d8eb3872029c3dc958fcf15722187e4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOBRS2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18ea8d38c4056adccc32fffb55b374a23e93beedc3cdf510eee32a18953479f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NOBRS2101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bd43924fdb9230763578d3d8ed68b53b41e8f66f0a5819b9af5d46f77d922f. 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/NOBRS2101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5bf8fff46f349f947d7044e7e2e43c0a460a0822e64ce8a560b066411bff5d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOBRS2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee3b5dd9559cc79f8518f1425f1bd9023f448e4aca883ed7bf5c11e0a5378a. 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/NOBRS2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d0153691ee5b66451208ecaaa6e90ccd1bbf0d8d569caa5749ca034ad6f71f. 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/USYBL1801147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3cf302c0fe99c23a47535d7ef0a3a58d9d13f513b4556ad2e868a980e006ee. 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/USYBL1801152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f9cbd495242fbdaf7908297331a64ca02ab3c6fd1faf0aa3ee3e06b447cff9. 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/USYBL1801153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5857943e1e7d2c17c6214ee59b466eb9ce76f75b3361cac33cdb782400f6af. 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/USYBL1801154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9da72f4da7d87a0ffb05cdf5f1a477d31e1478a9a764e15e4822a7198994a9. 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/USYBL1801155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9c15ec4b89e602fe195b4acd3437886c8d63229f2047770a57877df7feaeac. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USYBL1801148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb1e57d6513061a5de06aaddbdcdf87df113ed5c601202b277df4d16c9a66f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USYBL1801149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c0d19cfb989c426b3cd67a7224547351a2001f8c70e9c2a6b409771efe8b16. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USYBL1801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd42d4251550a5587e6549c62cbd84d00f6d051f78918279363df62179f3deb2. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/USYBL1801151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8196f5a52c27a8cbc515b1f323b6584aa15db8ad7891e1d2f8ef6ba75b2fbf. 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/NOYRA1601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d986ebd54dafcf5f908b82eeeeba41b877b937639b3b13364e48f9b99ec601b. 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/NOYRA1601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727732d9572f5aabc8d68ab833c4293dfea43883c00992d2058950ba1f209177. 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/NOYRA1601080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25a5961f00a9f2bfeead979d2a1de87b14760862b3a618f60365282ad1ec14f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NOYRA1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd704e2fff8830ddc851690efcc31eaa5502c3ebc884890c1fe65e8863b98f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NOYRA1601030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88920a4e425ea31e0da7332b441391f8e6050bb53ee0c591da5b5fca78bd64e7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOYRA1601040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2124f5b8c48600c8b306d8a63d651131aa1a683e15a56e00a22fb9c3571d6af. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOYRA1601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bbcdd9cd232ae83c2e42e5dcb62dda9dac421424555b90be02749e0236bf9b. 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/NOYRA1601070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f4e21833df32c06acbf5e23af12c3351fa79dc6c1c41e76ae552a530e58864. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOYRA1601090.