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 0xe3b5ccb1ca741e5aa7c0b002b52c59ebda1bdee8d23e526d5217ce21e79ada7d. 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/82f239b2-dbe0-44b7-8b55-d47023491986.json and https://artists.proofprofile.net/proofs/artist/82f239b2-dbe0-44b7-8b55-d47023491986.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 0x341908785193aee6c9aea1d7c3986a38916a8e7bb10f56360df9c4b638e5db95. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZJDZ2000382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d328f4be7c3a71280c9821ef17a033e1b67acf6d8972ef30ad4a452261acf2. 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/QZJDZ2000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56d4751dff35adf590824f3bb94a701f91dc61dc53fc00cc1f7cd1a41bc6ec. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZJDZ2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78145649d961b47d1c347d90ef29b48536eb44a755ea99fb5361444c047f057b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZJDZ2100446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc61f8cdb776ccc5ecb3c9ade58ac096e1e5f002461212ed74a43456a61398ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZJDZ2100717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10e5ea2718a77ff02a892c8e0854147dd55ddc3474b197ca7f07cbd9d9ecc41. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZJDZ2100911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca8fdd54e0c228f912b58dacec870dfe94ec4cfafe2127fedb6d7d9efbd33a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZJDZ2101459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21202197d71b3ce4b4253a3d35e771eba51e4b195cad03de6764a23dedb0be20. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZJDZ2101686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c9c621410518b133d0f5a2fd8c03b7ac7ba3da9d389871fe0b778602eb663. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZJDZ2103066.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f5df49026f2083841682b71138c80757ed6c54b46d4a31e74c6c3a667676d. 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/TLVEM2470772.
Loud Background Rain Noise for Sleeping, Meditating, Resting 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075779e0205a1a3e360c708985a09ab4babbdd94e2e664abc949784ae55443c4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TLVEM2470773.
Loud Background Rain Noise for Sleeping, Meditating, Resting 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69deec8b67a20570f7ae5a402a045e2207be9ea3a9bcdad4620fafaff4c6e7c. 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/TLVEM2470774.
Loud Background Rain Noise for Sleeping, Meditating, Resting 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0acd526abd8db8b1eb60da3b95445e948822ee3a3458ac91f9f1d53240dc419. 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/TLVEM2470775.
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