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 0xf4e9187e9c14387923c75de2f5e71e8be7933ca4b0aad42e09cdec986a7dd70c. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3741d906-4ff7-4d62-b32a-079867d5474a.json and https://artists.proofprofile.net/proofs/artist/3741d906-4ff7-4d62-b32a-079867d5474a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hunger Pains, Vol. 1 (Hip-Hop Instrumentals)
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 0x4e216503f6b1a70cd6b6fd66fe1595d585bb715944c701d58e3939bbc1c89888. 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/QZWFH2489111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44dfa14923829b538348e54dd35c10f38c7dd03d635da6ccd177498fa4aef0b. 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/QZWFH2485621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03ec39b2065119e2d3eba198bf6d947c44bedcf87f59565f2753e07827eb36d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZTBB2455825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545a9ec70cb153691671ebb4353f67c6975cc44ef06b5b8730803e95019f9237. 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/QZTBB2453884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2226757455cab6878e55c044585cbf2450712c28a1f55ede92db70c8cb0a0c5. 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/QZTBB2452653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b57477016fc68a709b9c56c119c65e4187a92aedd23ec499a3ddcd5b0f19d5. 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/QZTBB2453887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77b36d85a50051c5d9e83a45c4cbf52129dd5fd9bad3c2d4f17b75cae754692. 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/QZK6L2442582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52883fc2876c8d858f29ad80ec86aa5013ce3d8bbb40301db739aa8d2f7d932e. 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/QZHN42403871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3d3405c223cccda0dbe5d9d6ba182f51cd80a67f7063b4f1443c4811ed4819. 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/QZES82457829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cc5e4353513a4400819ee07b9f10807c1740f13285b6c72cc403090d7a446a. 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/QZES62441957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e6b05ebcf5d33cabef3969921e3956f722d42d77253372d43a015bb66fb64b. 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/QZES52491965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af8687e47a55c2a72f3af0142bb62bf0d58c2b3cac91edc858b59a3e99137c. 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/QZFZ32448495.
Graveyard Shift (Trap Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633c0b88dcbb266e3bf3d25a78c03d9770076c051e0994c8ef7bd2d3ba600e5. 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/QZWFE2332837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea52c4719db68422b5ee64a02df0fa57613bacf84e46158b6c38b48738c2ec4b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTBC2350054.
Beneath The Surface (Boom Bap Instrumental)