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 0x9b79f6bed0991676e2b9036cebe292afc109674a5e94fa8669d5d406249a204b. 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/0eadcc3e-8986-4e18-990d-c7cd4c52fe6d.json and https://artists.proofprofile.net/proofs/artist/0eadcc3e-8986-4e18-990d-c7cd4c52fe6d.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 0x8581e6a91b8916602f69a543ad5e902db42c65f6f01115bcf20cea710aa7d9eb. 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/TCAEL1966525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11374368726c09abe076ca899f17501ebd98f4d2469182a45933eec7a8514bc. 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/GBJX32061305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627fba6f9a2f23e2ed12bdaf297e0c0025e47b441795c27a0a8e4330edde1bc8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKSP42100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a8e763b01d41d4abeca25c19c36da372caad7442bfbf361b061920bb28ba20. 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/UKSP42100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c1af14e2260a7a83317293feb232167dc5d47b197c086bc1fcea495f991e96. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:30Z), 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/UKSP42100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcaf78627bc371e6bc3a6aa1472008f99618dada87c995c7ff41744a57b27e3. 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/GBKQU2195969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fafc66732f3a8664a1e0b6d88f3050285b8643ff8d93148747665c570b1920e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:46Z), 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/GBJX32388004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b0e685fd1208d0c28218d62cb6c0942db92903073a6e0dfd7bf87e7bc3cc3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLV62304734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e586d15ac123581e2681224e5270ef50b7745373ce71ee1c4b92170142ad8c4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:16Z), 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/GBLV62304736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6600f4b9e065bda3a62f1751b3017a882c371d631fd3ceb8cf29e135b5b59740. 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/QM6N22472931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33252a4828234a24ca7b68d81ca2139a155391034c67c754838d8c7e963ae3d3. 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/GBLV62421406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f963cf723d5cac0b623901654f44b4ae84ae4de009ed9bc690ea16483b9b3f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:37Z), 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/GBLV62421407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a86adeface327e99747d77b8fc6f1532f93e187212c4b97c5527c126d618e27. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBEWA2201483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c190cf1ac2c9b23add3b4581c7bdf7445a594d8073c607d7be5cef3b860031. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBEWA2100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fc9a4f8a0fe71d3b84f96864139204bbce403ae65f845f647abea5c2698771. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2461043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e09253996356d34d99164bd03f193414cc8926d2cc60249440d658ceed24732. 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/UKSP42000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a176256f52f9063980d41a1c79920bbe9c97c39b5c107ee7ca9160b5c4343. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKSP41900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f33730d0ee73c1d2e5864723f4b5c9b058f5fda99e7ba07feeed54608a3ba8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBEWA2200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d2169e0b0bebe939a43211618e202ef3d4f98312f4b07666d5d851bcb8f99. 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/BEIR42300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6498e0e287c3b245d9b345d997a01d3fc835058da1eb6477c92ef53c176efeda. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBJX36116122.
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