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 0x137fcffcf81e6c7ff6826215884e902832353c94322e73588aefa2d722ec4f6b. 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/8752d2fe-7548-4e25-9c6d-8e0ebb4f11e0.json and https://artists.proofprofile.net/proofs/artist/8752d2fe-7548-4e25-9c6d-8e0ebb4f11e0.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 0x3e20c36946038e1b36807278a7d8622cef2967f9ca0d1acbe0f4d1a27dca4b67. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/AUHS02215245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd195541ae411d1b674e4d48cff81710bd769f4b9ac94e6fd803fbc06ad715fec. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUHS02215249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4197ceec6f3934c5c4e804c849dbb9496fbce9643c38db87f0159e3c2868f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:27Z), 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/AUHS02215253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a05b27a247f459e54eda4e06c79542e4530db7623d2210bbd2a14b092caf720. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:54Z), 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/AUHS02215243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de3ed6e63e4e0d56e048d239c988dfd3a79a84b541c485c8febb5ca252ddeab. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/AUHS02215252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84fb5ce472187dbfdd82bc8d0f7a192c08ad67cf4ce47cc364a6f36a07bf087. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/AUHS02215244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e20c36946038e1b36807278a7d8622cef2967f9ca0d1acbe0f4d1a27dca4b67. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/AUHS02215245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a78848b170bfca1d112ee4bd03fd524a50b0d40199e07e4daeeb8b92ab69da. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:38Z), 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/AUHS02215246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ec319dfba7fcd25d5c4741f97b0ac81ed1e7dad85337bc8617bde425223a8d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUHS02215250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caa6f861fdc26375bb78dbde012a25972f31e15c9b04d20fb13d2acbed40d77. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUHS02215251.