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 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 0xd86dfa314f6cbc40439aed1fa95fee341954f080457a08c2cc19ceeed1c6271a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f32b7eaf-ab74-4548-84f7-530d4a207d46.json and https://artists.proofprofile.net/proofs/artist/f32b7eaf-ab74-4548-84f7-530d4a207d46.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 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 0xb1686b223b2dc6b830752bd4c3a2b3ea9c82217f5e567d5774be7682e5ebc35a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX3Q92484119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7947b2dcbad2f5a748deca5038a626e6d24fac87ea06d4703b45292c9f460e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92484120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e050d9e60c9f11b37fc312e5051b32de8305a8d04cf6366604fcf8339d6b129. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GX3Q92484121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861b815e419be5fabc9aa1d40e7903b1ce1f498511d09f706150c589047be549. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GX3Q92484122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ffdfb15685381c2526cf3a69cf8b075b0d1d6f56b2dfec6a6782e0499d2c8f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GX3Q92484123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c724ee164ca0d141f384909a0b162e1ad4ec7de703adfa896180d58e1e37c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX3Q92484124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab287167244d9e6443f907c5ae2dec2d71c0e997614a15ee5f714b44bf9f0c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3Q92484125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e00823e0184e0b49c527ee6aad8f6be581b7adfecd02ed115891a112c741d8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UKXN22472095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4597a539e47b990e5678ffbc7a56ff8cd906b4c8e857bc000698477711a19. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/UKXN22472096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fcef88a9080905f7aa29401847e8d3b89b7e581cd306bb4f1e75138791e42e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22472097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8097120ff5fea8fda5c953a12eca910ed0acb9ebc2477ad681c83aac65d0eb82. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/UKXN22472098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d52c48654275c54d50460918d49da272dbab14089b73c65e70b309599eaabe. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/UKXN22472099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3afe1f149bef7fe0755590a347dbd349be6ee5f1a641e7c10203c637e70e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/UKXN22472100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cfdb0510efb32716fc05622ee4c4db4da2b8f3bf5df55d47ef045c492466b8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UKXN22472101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966760219fd66733de8a634c7e7d99abc2d48acfafc9a6ce1f8f7944017e20ac. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/UKXN22472102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5620226d6dc693deecdc98779bca2975f7716569809bf01efd3f66873a5ab2e0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/UKXN22472103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db71f3832a584bfe505fe256ab1d5092d1d0f2223fe10dfcce9167e25ec3c9c. 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/GXF9Q2415014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f1dafc4952d3f68aee2fba03bc1c223666c97f7da4de0c6443f058085cca79. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GXF9Q2415011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ad1e96c4ec1cb28734d0e32db9a54c7668150e550ecd4342ea518a1d04c067. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXF9Q2415015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444f3445e8880175cd0e8ccda470b920dc758533e1332083cc75c090043b3a0d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GXF9Q2415017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15310a2a33d609a74b5f16b0251405b5da4a0b465147848847a46e91714c94f2. 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/GXF9Q2415019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66af55e5662b39bff3db52fe75ba444c87775c9bceb8a5179ed4efe2e89cfcfc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GXF9Q2415018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be2eea9eb3a5aacf94ddb27292bcb8041b9e53350a7073d625f53a51de023fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GXF9Q2415016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c22a97e8db025ba64bf99a3e3d13e44b47c2bf4fb9cf4eeddfa8763ab3249. 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/GXF9Q2415012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6bc17c422ba5f6ef81c306ddfcb1b6f6a18ecb94a7ad6744831b918d2c4cc5. 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/GXF9Q2415013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6458b17390795aaa2bf7f06f4d5464f2b71e84f931b25912e908c0b3593087e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GXF9Q2415010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cfa4675121e836af474d955780c7ada3631552a1d06c95aa758c9d4818a248. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXF9Q2578134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a29fcf6cbb120fdaa32509d97223c9ea4ac4fec0a448b230adf54aea04dd77. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GXF9Q2578136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de8086e6db61c67067085be794c4903dafe5b5f08f52aa9b256ce08ecd57faa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GXF9Q2578137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396d9e7266f6f2d29974b78524fc25e16676f90407b78d90ac2d25ecacc5302e. 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/GXF9Q2578138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49194604bfd0b516d83d720d62b2230422ec30bd641d774dd6e15bbc02e16215. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXF9Q2578139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932f67ba0bd330b9a85216e2fbda451e5845657a1d88ca7a6d8f9080e9779d52. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXF9Q2578140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece58e3a269720c01587b41f0002c0849cda3f98614d521c2c50682a5f7b8b8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GXF9Q2578141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ddcd607981fbea88abc2ebaec24f524a4b6800f705d8baf85bcb6023f02ab. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GXF9Q2578135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966f090a8cd0bf9d18b2276b11699816dd7eb96cd93da1a1719704c2a8a0b9a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GXF9Q2578142.