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 0x10ecbd351309e4f11c26be0e4d0974b5a3dbe5088dd16417734a37212fa03583. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1c9a83-99eb-4d3d-993f-59388b3e6ade.json and https://artists.proofprofile.net/proofs/artist/ef1c9a83-99eb-4d3d-993f-59388b3e6ade.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 0x50349eb26a41185521880f3d25e4a86a270fb76b7af5eda1ecff733456949701. 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/CAQTR2403002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6d0b4bb250d1d0b8cec3857d7e86fb97bdebde74a5f5098a43edaa87dbff7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZLBC2425530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a08613d1a931ca25419913d54f5a2d4ab3b6323bd3d5f39ad8a636907af7e0. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QT4K32510561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d196e9ca0c95ca06aad7a34dab462a6db7200d64374922255958d64772cac62. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QT4K32510563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e2b68cc0395ac5b7519b940c99c2c0cb74269ab6ecf406d64464042017b967. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BXIV82490288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd018a841b27d90d895af70a0bf2a7a3949761ffc713e9c4a6769301142a8ef. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB72561273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c66d27603b1c3158bdfeee756a5a388562ba2868c3d482cca936384eb18d879. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INSN12506984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849be9b1a96625c8c43905077ba61fb35ba8d61e662c70ca5c7d3829fd4756c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:30Z), 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/INSN12506987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9245a1e3bc196e07952b519fe6195c1904691b324841fa2357d1c83f492c5841. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/INSN12507142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7dd3f5ee2973875e058252d3b150ba0aa663525e1e01a390f9c4f8509fffc5. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:04Z), 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/INSN12507143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3d4fedd2c9bc9bf672af45309a1c085b75048334013330aa5fbdd51a0c544. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INSN12507179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1a00c5d298c1dcd0e1c0be611af7093a089fc88458f15207936ce4386fbb17. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ782570253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88366fe0b775018507f3fa49656de8c5a9f966dab20e58cc0ce65402e89d07. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ7P2554972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea3616fdf9aa5137b42ed71670d8f61dddddf65f0d71b6d78ca3cca2b9ad08. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEKB72552846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bb27db5ee61b3a3cd6e65f9bdfb8d804f18e4ab7b2ec9e1a512f08836934ed. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEKB72552848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62fe2ae84fdd31db108f10846c0018a8b072c72aa0dcd128fa8a639c1f244c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3F32525120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba72d2ad049677b2345a07d787acbf4d8a63909aedf560ede2ab6046a471cc6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F72527724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bfca3d1adfe4c8586697d831aa2ff498f443c6485b1aebc4a92a27c1136184. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEKB72556748.