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 0x702026d60975197b5323b711503d87b9130a4da6e39b8fc69b5d3d245523c29c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/608f4803-67ab-4032-80a5-9061af4795e1.json and https://artists.proofprofile.net/proofs/artist/608f4803-67ab-4032-80a5-9061af4795e1.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 0xc73844c07205c469496307920b36394fb90f8c6cac9613db3f9a78a0d0013544. 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/TCAHM2356570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab1d57ce25599b33bdcca117db366a79cf7f34d406150c63cdbc8f8dce2fa43. 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/TCAHM2356579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59cd232bf11ed44ccc64f6f0a920b6182d4d540802461701592f989e8d12129. 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/TCAHM2356587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3de6191222d41543c4e32e6a54f634bec59db994c67509d34d580a3952f2d. 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/TCAHM2356702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f722c7da33f3a32b36dca7a5e98349319d5f001c16d76f86d6e4d9f273897d. 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/TCAHM2356766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b833746cbef8bdc2c97af0f14d91785159566bac06c4cd10804126e7d4cfce. 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/TCAHM2356809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302c808b0459bc96b7b5f095be265a7021818b2c9c95b4547dc74d798795016. 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/TCAHM2356819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a091902f8809f1c3c528560af315d1f0a64d15fbcf93912d3d8e1d53d95d2dc. 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/QZDQH2396121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc8e200b0ab311108db3d6d36c7258da932062faf677197b0a8be9e58ed563. 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/QZDQH2396122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a28c775f3cf12d832e6d39d297e5e8fb1225af46fd0dc2bf6951029fe1ed26. 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/QZDQH2396124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59b55358818aaaa566da70bc1589e2e3cde3b1b3bf080395a0f6ad4b65fd08. 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/QZDQH2396126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33adfd5596abede95299475ea3db52d2c8d2e188f43a5d3772d7b6b23c4e6678. 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/TCAGW2342263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72173684f1509ac896adf2043dab4d312fa6126c792fe418f2d69c451dcf96b8. 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/TCAGP2290867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd470c6250f25019d733a4db11470832903c0ac46d2fb4ca0eb899c6b3ed9a3fd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:19:30Z), 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/QZZ7W2446747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a37a69d9b0a364a1fe62b84b338670ff518c5ef13019b29481943a5accf5a0b. 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/QZNFJ2403339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebe1f3142e5d0b43df0cab4e95d85aa0f19ef4b6cead12ce7fd284235425c7e. 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/TCAGQ2219154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b75e9fd2d0c52cab4108e65df5070e05dd6ddd9bca7660afbe2517c4aeae7b. 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/TCAGQ2219208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bee53c2cd9ba28b36f8e3cce96fe1452a3afd9223c7a3fa73e970a8cd2f115. 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/TCAGQ2219217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8654cac5a76ac46eac5fb58660074b0dd6a7fc64ca5ebc439d8a6ad572ceba. 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/TCAGQ2219224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d41a79336e2f51e31a6c51ca0bd5a3be386092c398866b841a77e95988c203. 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/TCAGQ2219230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e10eb241faf1f5c0a9b1d39576e17c73120a6a4a309b7b043b1818b7556a32. 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/TCAGQ2219391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275fb3863329bd6582bdd9e38496414fb00f118fbb682d6fd9adb408b3343464. 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/QZTAY2510638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd899626b3e2d94ceec8db254611d1628d853004b6b5f476ca17940b4e8a30c. 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/QZHN92569452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0f7c1121c1ff19e104df65462ba10a21e471032e65c9a017b10349c039b40b. 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/QZHN32500684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32ac73fde8c2fc026b3dd22fadcdb5b5adb6a685cc793976c9c0028a57668db. 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/USLZJ2523347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9e4822d05a932165004d7549b8a6e30fb32fcb61b4f861043f43d2ead4e631. 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/QZDQH2387480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29df1374f7abdeb1623d06ac69b7c0e7c0d22dfeb0b24dfaa63632e625f9ecd8. 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/QZDQH2369332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b97ba28d2bfe217cb2e6c7c4a03eb859465aafb6a83545a05782a78e3c4f57b. 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/TCAGL2218340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc575f145253627b52ee8765e6e68e35ec26be7277d635e60dfa617577a6ceaef. 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/USA2P2200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9579dd743ed2873adac2b718eb9d5ab91f8a6d04abff0482abd482110cc76dc. 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/QZDQH2146640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0794d34287930755bb483cc00a9b0cc3e6041d5798acb189a1c11b253d207124. 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/QZDQH2144475.