Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterrane
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 0xbef25642d27187ed97fef9c1f69e831eb9cc64219a5bc5d525f369b1f9cb5528. 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/93bb77e7-8d0c-4fb7-9fbe-896c976b060f.json and https://artists.proofprofile.net/proofs/artist/93bb77e7-8d0c-4fb7-9fbe-896c976b060f.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 0x76da66c4321ae1020d23825a888d8b55394cbe83e956050338664ce15bd2fd76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM18600196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91380744fb91e196da249071b6e2335dc3aa3cbb049d4ba19e50756029d4afe0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM10105445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da101e23e5839632a4f992e94aeb30cd1a232592d055ee0fc8aea8a2179fbac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM18600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78345aecd765a205ebc3baef8183736b52dd535aab23bd287d65510f759ebe03. 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/USSM19801612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f744a840a915d52d485e3deec016d4d8b1f7f90a31539f76d79506b9bdc87b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USSM18600197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da66c4321ae1020d23825a888d8b55394cbe83e956050338664ce15bd2fd76. 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/USSM18600196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cdfc5a167e2415005fa086acb124ff5ebc1c2a3ebbea0a0eac0b9d12018c3a. 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/USSM19300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da101e23e5839632a4f992e94aeb30cd1a232592d055ee0fc8aea8a2179fbac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USSM18600860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da66c4321ae1020d23825a888d8b55394cbe83e956050338664ce15bd2fd76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM18600196.
Haynes Ultimate Guide to Classic Anthems
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da101e23e5839632a4f992e94aeb30cd1a232592d055ee0fc8aea8a2179fbac. 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/USSM18600860.
Live At Sweden Rock - 30th Anniversary Show
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c041a62f4e7f312bb7e906b984a8f0cb581c6f59b3d6060108e4c0b51cb4fe1. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SEWEK1300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8d85aabcfd9f6077fe965fee250da538e1cc0f48b42c0aea6453a5a395544. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/SEWEK1300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba572236127071d580ab2a9bd95370d90e6900d5244dfad28aa5bfb10df4caf. 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/SEWEK1300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f4489f55e581ca5aab38b1654f5d5494115a73a53a2fa2d54d7dc3a4701efb. 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/SEWEK1300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1037ff88e1112a08fc530884fec3fe35c8e583eb8d84414e594bd7dcdf3af759. 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/SEWEK1300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ad5af11ec2482cf1cead4f0b64b9885da27ff76fe938bde4ccbace5abcdffd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEWEK1300102.
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 0xc5882a5b91aa770d6eb73233cf1a3afc34fbc394272dbf360d5a67e4dba70b5d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:47Z), 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/SEWEK1300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbacbb350221b1ff60491f37fbade26eb4762e5c81d11fe17ca1d3427682e35. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SEWEK1300109.