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 0x2d18a083ec956a71db897611d44be4b57858443dc3bb026f6471728fe03ecff3. 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/057e3400-fa3c-4210-a4ac-0ee17b17a7e2.json and https://artists.proofprofile.net/proofs/artist/057e3400-fa3c-4210-a4ac-0ee17b17a7e2.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 0xdf9231c26f33e949235ac0e75e7c522d64e144c6b9bc9634bf026195f161d924. 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/QMDA71529180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30e35b8e144265097f2668b48d73d15c48da3988778ee92d3b449079c3fc5d. 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/QMDA71529181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ec425b3e377ec7cd22d13e0f720b4978d998a1d0fb347dc353c7c56909633e. 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/QMDA71529182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851b10783c8fb24486c425ae8ae3e6244f5800dbda08313973d81b4cc8a311a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA71529183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99ffff06bb5eb55809225d0f2e9f398febdc7cd8752dfcd4764e2c29bf2eee7. 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/QMDA71529184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59025a744a292d667b2440fa7db38b1f6e714f8079b878529bb1260bba24c0fe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA71529185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa094d9fd05dd5bd4a9072d29100d528c748b33b7a224050df7c3151945b4ee9f. 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/QMDA71529186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff194b0424e36c8c0a72a62e5841662c1bc26fa3c98bb9f329503f374f38db43. 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/QMDA71529189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1256716fd492bfb0b8f11079821c41a67e174fb3003bde72252ad95a9df164d4. 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/QMDA71529190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54352e04a4711406e39a7ac37f898b2990581a49ac908d2ab7a148b7273fa18f. 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/QMDA71529191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2856a49116c14463f34a8c5c61f7581a8e444e087c82b23e91e4ba5221b231ae. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMDA71529187.
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 0x2a62a69dea20785e6e53545db90ae0f52f4b75da617c54e9c55576d4023837c2. 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/QMDA71529188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5fa75377148016a068cf95844a375b8e63c33bc44e3f7f342f04cd4fcfab4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMDA61588403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc052be8cb4a04519a4785f4f52c506571fe12ae964c6e7767b758fabfb51b09. 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/QMDA61588404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c979e329d076c4dfaa617bd0dbc49bfb188d5a68beb222cdd3ecd4662b9cdf7. 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/QMDA61588406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e8d98ebd564d00a7ab6ca8556ba8860aa0006f070febabe34a1276c6b3226e. 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/QMDA61588407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f233e053cdc2f196d15bf4f7ec67fbf216714ef803405db05711f7338ad9a7f. 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/QMDA61588409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf170c66d4843c4cd4ab9dc8ed46f32300615af95147fdac1e20cbb6e6c238bc2. 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/QMDA61588410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7434ea2c08a7a6f4f5311e4584414b1628b809f6b9ff99edccbc7f9e9484ab5c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA61588405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb973d9c14ea09467c852feb4a49bcd19645faa1818bb7b7da107cd384679721b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61588411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47d1710204cff87071ffc6e2cd794d64a0464ebd45085166e39d3f9516588e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA61588916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4376393035188a64c3d1d21b903fa9e35290120bd9f50b0ee152457d20533f8. 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/QMDA61588917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280ded49f46d946e1c478d236993682d7c2855fe034561b77fdd22315a11781d. 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/QMDA61588918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae6cd65df9a84e7f8ad55dd16fe880f4d1d1043aaa309bf715cc0254423b45. 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/QMDA61588920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6e197b0280a7d5a4aaba340ef1bf9126fde2c97bda9b3549fcccc597562bc6. 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/QMDA61588921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ca55589d00f6c1deaa3833b66d8bd52f69adae863c0e640604ebb6483d2d0. 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/QMDA61588923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f918bd0438b5b985b4b5dc9c70172437363f0e76bc79d49623c552f0a7af6. 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/QMDA61588924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2819e30a1655d1c3c70ed8c323e8a2c034b84b6bb500e64f94c65780ea518. 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/QMDA61588925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecb94af1f95d1f70fe0483675ff721c57ece1a1179a45d438c48e6f8bc6641b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA61588926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14525d3da73d1a26cd8336238986d7cbd145c7b845962118b189f9f13622854f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61588919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42feaafcbd54665b86ff8a265d3c2bd11c1686221380f5ddf50f7fe0b7f9c18. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA61588922.