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 0x572ab5e124233c8e431f4653b8950ce31f3155dbe367dd43b98611ef2f862002. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b06158c-e0dd-4172-89f6-b10283f11d83.json and https://artists.proofprofile.net/proofs/artist/0b06158c-e0dd-4172-89f6-b10283f11d83.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 0xf27c4bcfa75d54e6969896c73f6a206e5eb5c7b7ccf65fede5fe5c8f7dccf7d0. 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/GX3HH2250170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d21aa55baa1efa7e17e6ca5a78cc448b0902b5e8e53a0e11f4ffb55d7201f47. 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/GX3HH2250173.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b655bc544a500baac557203fafcc354e333095dddd8074d5e05335fbd2b134. 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/GX3HH2250159.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b644baa245b41ff7cd147be0be25cd4ee13b02a38ea096d052b7ea2889e010. 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/GX3HH2250160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f9f5ffce07a2d19b7957d4fb46e4f2a30d2ed1942926644b0d2b1f58f97dc. 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/GX3HH2250172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7cbafcc2f1112734c84382110af2668575b0d82c3efd51249fd0e0891ec20d. 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/GX3HH2210262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa1174ec482323c8a0c02637efd3594f54dd2e95abe1d155f5bf40369587db8. 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/GX3HH2210271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fe586b885b9940435ff2519c914557dc73ccbc49dc31bfb3dcd2b6e333d538. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GX3HH2210259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c7c335dfa10a37b2d1988758797e47136c8a6eab09f2a62ee1e5fd841b5f23. 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/GX3HH2210261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da85fb5b026ebcd2464027fc7947e4134eebdbea79b638a7c452ba9d6f5cae. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GX3HH2210263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e1b5213061360fd5d9ae8650c26b725cc2f0961365cf16af5e1bc2b0435d3. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GX3HH2210267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167d7f0d1a5099d41632911088c2bd3963c4a7f1d9b2fa006085b05d56ec8caa. 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/GX3HH2210254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef889b941cd90fcc13b264f5b61ba212d10eb6d19a0fd108a6dce1e0a39353f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:03Z), 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/GX3HH2210246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7c8ec13294b56f0034413790e32342934150d1775f9cd59c7292930d8743a5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX3HH2210248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ec79cdec0139221549c6be290e353f74ecf3e6854efff62705d319e85aa3c3. 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/GX3HH2210250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8d3a94d8bb111b8e3a76f698e2209b5ab8574c023d86787393a894a56b0360. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX3HH2210253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d92af06962d32dce8b6b213a6baea94294b3195b6752f4234084926a84058d5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX3HH2210255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a9423762428dfd7ba5584e35b60e9926e91204f06a058f8954fa2337a6c17. 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/GX38U2237772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e3b25371d1990cbacc3bab709322f7415c017526cf131e073b31a3b8c0a4bf. 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/GX38U2237773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873db8a6a97d930361cccceba4379e36c33c786a84048a4f8140bb98f3cad1e. 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/GX38U2237774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd295950e2b93fa1e89a8f1f5d4118a2553a12a5f9d68c7b7eacf57a2141ec5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX38U2237778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734adb765229710f3c302424bc6c3878dcb8008edfa36dd8dd0262d9a1a9d6c. 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/GX38U2237779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab89fd68b81ac19025163747bdadcedda703615cd94060ba92f43f1cf8231ca. 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/GX38U2237780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe79c27f6adf26392978773e934e0c902083a0770bd8eafab8e4c799a9a42a. 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/GX38U2237782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af156bd23075bdef15745924efbed65762e35dab8b4f1d9c85e0ed8e7619c1f. 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/GX38U2237777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469c39f12b9300df8d407bda0583a697f380b9f86f3a510d308e7e6ba952a599. 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/GX38U2237804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7917d018af3ea967b680a892a4bb2019be45189e7c46730a0f79b49c90273e0. 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/GX38U2237805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf151c9a8cbbf0efec9bd15686019f062ce115261caf54454a74ebb8283804c. 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/GX38U2237806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e346b2cf17a28e893999306640d8add4e4db0297161dcb574c1305dadb5ef. 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/GX38U2237808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a976037e431804954d70f8775d815de36f1f900b2a7b64b9913a2c1d55186e7. 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/GX38U2237811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc527309eac7f0dbb73a192a31d6ea9709c199b96478ad69ea8e8f41236f9e12. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/GX38U2237813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd26d6efe48c28ae047b6cae0f10fd4f238649574158af8bf0c3561c10aedc8f. 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/GX38U2237818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ae73eb317cc3be1f3760ec0567a105d7b3d8e5c8eeb05359c1e745c1c1e19. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GX38U2237815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956f41fbb9d13bb8f8c9a7b823858940ed9e978c18f03ae577b17f4a6a97191. 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/QMFME2229412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26be6d9e5b452f787d9fa9fec3e061c299f9f9ed71362fed6d7b1e0f34cae7d. 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/GX5MY2163625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17283fe0a6dd7f7da448efdf9bb1f025f4623f9466abf931413b6d9fa3b1fa3a. 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/GX38U2213917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f63a4e009cebbf7035e58f1fc460507b23eacdca60552a3afb5a6a55441cf9. 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/QM7282055826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46343ab9b00e8650dc9cc78a6a7bbd480ea9020aaf28c8e01492230400ec582. 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/GX38U2213920.