thumb|upright=1.2|Restoring the frame of an antique mirror at the Upper Silesian Museum in Bytom, Poland thumb|upright=1.2|An antique shop in Da'an District, Taipei, Taiwan thumb|upright=1.2|An antiq
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 0x638ff15dbdf688ab58b3199e59209901879a9bdd0348dbb95ff017c0a51f2580. 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/66cfba46-03e9-485e-9413-4b8885c50f54.json and https://artists.proofprofile.net/proofs/artist/66cfba46-03e9-485e-9413-4b8885c50f54.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 0x683015907eaa328d3545eeb3231464b61c291d1478de49f86ff225e599875db0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEVGT9901004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e5f0a6c19336fab4d5e46f3521920b5fb8ac146b61779f397722f8226334c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEVGT9901006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d7eeb4d77be1b3c1497e64fe275b58ac48786f2915ce68125d276eb25926b1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEVGT9901008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc290134d23e3ac6f671b1e483a69746dc7b14c794e76cbbce5e9aa38c226e479. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SEVGT9900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b75de4105870f9a7580672f2faaf07af4ba8eef03298f74310a4fcd31d135. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SES632000083.
(I Would) Die for You - Eurovision Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d88b5828ada2b839749cdd06ce6730b93bd88eb02958cdb8cca180617c14a0. 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/SEVGT2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba381dad19b133723a55768c5313e2748f0675c4dc3d2152e0b15c10187822d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SEVGT0101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b248e6ea73861a02882bfe0a176402ddb8d3dfdf3155dfaaacbd1ae1beba8. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SEVGT0101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f68a15df6256d443b965426ab1f50a3cafeffc4e0484434764df9c0dbe860e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:27:31Z), 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/SEVGT0101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0873ae06196619cb376921f53f190ae8a02ab32c34a23c095f3fd4dde1201e1. 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/SEVGT0101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0f518bc93ef74c40e5ad19330c090a07c0950e73eeb90b4acef32797eec7a3. 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/SEVGT0101209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276f97537f2d7c5d5e3395f2cc310d37818f3fa5a407212f15f33d6e3a09491. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SEVGT0301503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c379b188f3fbfb41e5bd7b75383e588ae34c2062655b25ed46293bf3956ffb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:40Z), 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/SEVGT0301504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974b87e38bbe0876e8bab851723be54e4cc8c0c7f4ec39c112fa5853bb7d744d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SEVGT0301506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5b4485ba326a39547e0eeedf7e4fbe0a81538c15967af384767eb6e6a83a62. 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/SEVGT0301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b23bb8321da6af01de312f38aab91026bbd85958dd2870bfda518a25e7095. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEVGT0301515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc253d06e4d20dd89898bdd639898f772e17d248d71fb8d1158a3e80ee31faa. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SEVGT0301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ea189c8dfdd8026d3cc03c1922179dc7096998eba5ea3648db0511a95a0d6. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/SEVGT0302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b248e6ea73861a02882bfe0a176402ddb8d3dfdf3155dfaaacbd1ae1beba8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEVGT0101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8670e3cc2bd29bfcfaa2c13d08b3a2b07b14fc507ebc882d073a4becdda324. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:48Z), 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/SEVGT9901003.