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 0xa7472a959e103d3c54aef2c0d0d73cb0d62ce66775e10aaf55a81b529fb62aa6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601f43d3-c9cd-4055-8b16-76f4ffa28aec.json and https://artists.proofprofile.net/proofs/artist/601f43d3-c9cd-4055-8b16-76f4ffa28aec.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 0x56e5221996a4df9a1e31e7b2a54797d7a3b0564494d13fc4b520eab69a68ece6. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/IDA510905664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57134e0960e0622b315df09a06bcb989aecde673c57b0468c01a564d11bbac27. 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/MYUM70600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8dec17ad3c0ef665ffc50355b8408a9c9b228260479e7722bb139d212eee0b. 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/MYUM70901323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a6c2447629c064f35cfe6f49b77c56d29d2a4383b0199dfa329f916be8328f. 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/MYUM71000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621992544670945c172f7395bc36dacc195ac98e980375c039a0dc0e26bf068. 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/MYUM70600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7d957ab5ad4c2eef396d814dfa6eb1a2bfc8abf69322d51d3997e65645c1c. 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/MYUM71000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b95c3c33285c99590481633d94b11d33d734ce7dd3db8ff45ae326f6a974b0. 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/MYUM70600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a7335505590075f4100fe5304da43a78f5d618c15f1187632325cb6d07d0c1. 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/MYUM70900071.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc415c6bdd98521301f849fbbbb75abd9004e8c2875acd426c870c42aad0925c8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/MYUM70600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83e44be5661744196a2567216df2e1554c888e0bac458fd3d0471ab4facbec. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MYUM70901651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddfa8e0f5312b4785f081f3c8f2d1dc6775a5ff086770ced3604ca2fef488b9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/MYUM70901254.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83e44be5661744196a2567216df2e1554c888e0bac458fd3d0471ab4facbec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MYUM70901651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316be762083756bf9a7782882e778d499bb11205dcb82a40d6546f18f20bef5f. 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/MYUM70600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77f31b8ba1f6a9a16a88f4351e3cfb35bc8e020d35ec64b8f8d73c8a5b10b9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/MYUM70600098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f546591c5a088121254d76e308c221bef51f8074833b57bf5d4f5fc23555d6c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/MYUM71600027.