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 0xae0177ba13bc47ecda494f4f4a2b909d94dd7a7c8fcb62716cacf5d73b370631. 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/16c21575-87e6-472e-9ff3-4ef057ebf765.json and https://artists.proofprofile.net/proofs/artist/16c21575-87e6-472e-9ff3-4ef057ebf765.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 0x8d536582f0e11e6e545a817eed64eb32825270752a05062aad04c503f6074dfd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHNC1935335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe022085dbf8307be68f001b34e06898cb2e73daf18b8bdff2ef89f7880fc25a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ72017274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4522a8ff02d6d9cdf6ec423c2586d399f112ece65461460424d017b89cd2e415. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEQ022105671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049ee650141d773c673ce0b5327dc815ad5f8aa573737ae1f59904d824879c64. 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/DEQ022105907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef47be208cd527302c6a389026ad25befa9bf363ab3af17d286476fdd8d51a2. 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/DEQ022280302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64932c314435d3f3d2ba3206f700bf26358de2c8fc86b30b9700076a6cfeab2f. 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/DEQ022280306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eca59da4a16ddeecfe0715e19b022587b15b4d5bb9f7de69fcf00322fab8bd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ022390020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd99aa37e7e3920f1fa840844964c74138fc952c2fcc62f2512080ecfb5fd614. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEQ022390442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae568df38d7b729b247595d9a1c45c94e162838870ee11868d7f4c406dda1db6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEQ022380617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c3666a753bcd4c24a1136f0df4e964b758fe25254731905f0d12b43286239c. 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/DEQ022371380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ca81c5a7235bfeb2298111e6d1ae6e29ad1051351d1582c586f3b160a87775. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:58Z), 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/DEUM72310103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a87e46b4af059bb317cba62b2dfbcfb2b4a934c77a09fb69c0d3ebd21087f88. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEUM72402583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9332f1dfd7a6070978edfbfdd7bdee3254c62d9b0e726f7e339ff8c26f79c6ae. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEUM72402582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89ad29bb7d74cec67e4d8c76c45d06099c25223dfb9f47bd71082938857dc3. 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/DEUM72404759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9332f1dfd7a6070978edfbfdd7bdee3254c62d9b0e726f7e339ff8c26f79c6ae. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:29Z), 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/DEUM72402582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b2a522220b77fc5c143c7f59a35cedb29f0ca8fd881ab677e7efea5ed2d305. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH7812547189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89ad29bb7d74cec67e4d8c76c45d06099c25223dfb9f47bd71082938857dc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUM72404759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defa92f84565c0fc9f29d82bdfb35f966fa39a954aa874ff2e3ebe8ea372dd0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022112126.