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 0x9e61adc2d846dd0285498f2aa0d1a7d11537a8bdaffdb465f85da3893a929c8f. 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/82238980-9215-47ff-a4b8-e9a0212f9c79.json and https://artists.proofprofile.net/proofs/artist/82238980-9215-47ff-a4b8-e9a0212f9c79.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 0xe26d0309e3e82ab812514248fcb6bd55250f1bc951fd2ad117ff5cc8bfff0ee1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEZC62369486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca833e70ee9dcf7fcb47884277cacf9e202f723807d92fc75351f179a6782fa. 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/DEZC62369487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e889d6eba1a072a99ab6dfb35639538d75ac71efbc7caf5db79050cba80c45d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZC62369489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000723b34b1508b890080795ff2db1563898a1e511798b3fcb6e3683906a82f9. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEZC62369490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc1f6a2d6ea1682a27b11871211934cb8a672edb8f478e08187eac3535ba55a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:32Z), 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/DEZC62369492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636022a67a5a7b2d6bae53ca76b68e52e8ca60c38c076282e8a94b974051ecbb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:02Z), 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/DEZC62369493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3996efa5bbb006fc66df7b0e24795da74b2f98b52447579bbdc9da7df27ed2. 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/DEZC62369494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edb8dfa0a0323f5b2227e29a270f4ea6d882a0ae3e73137a136a458b0ecf869. 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/DEZC62369495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2351efea4bf5a20596ee94e63f71f054ade8472d8bb27094392ea2a60e2348b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62369497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b73e334a7f10caf49a97683b557660d5f5742f7fba88d93543f4a1f243daf3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62468459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02081e59c01e5be5195ac47a7df2b00d7bb03247f7d8470268381afdab944064. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:36Z), 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/DEZC62468460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde72e878e39fa211c141bb9eec45ab96ffaa95a338a6ca2677150845a7c885d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DEZC62468461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e90c4ddd4f054e2c0f2a4af0817f49a184ea6e0b0116ef7bc87e5db3b51ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62468462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d84f2f93bd59cf342ed39a3e0d52e4ed3c82470ecfecedee3a9a7e46ae51e7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEZC62468463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bfd19400a49af8c91a9f5833d57feb38cfab57978c6fc6e8c05787b8b78e23. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEZC62468464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b2b59a746bee98373d0710ab93417ce0717a741b3dd121b721e10fa009b5d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62468465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d5a80bdb2ffe15735e9889575b79c4e0d01e4ec6fcc8c567054ba7b12fba4. 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/DEZC62468467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1e7bdabb65789d04443cdc1f126b4f195810f146c259aa6d73e7ba734108f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:22Z), 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/DEZC62468468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aa08448ed7ccece06025e96358caf55c8c57e04f28e372b062548a29a276fa. 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/DEZC62468469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5ed80c377d4bce217497dd0eca01a8375e4038821460fa2ade503a49c2505c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:21Z), 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/DEZC62468470.