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 0x939afdf06a7e9e3a6906bc74ec2a125c6a39192a69be983799cca8be58e208d8. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1286ff93-b38d-4f6e-acd0-ed881fd8e610.json and https://artists.proofprofile.net/proofs/artist/1286ff93-b38d-4f6e-acd0-ed881fd8e610.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 0x6d46c9c4b6428aeae648fe21f4abd2079bbafbb464768e76016540af87f5d935. 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/QZNWW2593561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230993edf6edc880dc3683066836fa35d337b9832dc5e6820a4bf419cc846c34. 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/QZWFL2540335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cdba7a63fe76263daece7ec8a69740e290eac94e54ca7502c3ddfd7d546cf5. 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/QZWFR2522117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45acd5b670eea8dec779f4cafe428724f677f9e76a79ae6af72df6a43b5e20c4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFV2578109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce0a83aeb2772c26f84ab45100f9e1008c62868358a2ed3e47247e355ed5218. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:32Z), 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/QZWFX2563002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8d8ebe22a9a4219080bba8cad73c149aefd0890041a3ddda06a6c984ee9ac. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZZ762590292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb3297092dda362cac273b199e6ddf0f2d44be3082ec46b39d8d407b23921ac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ782543666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3c35b30a930414d4c8988f9416989b8684340377467a4febd1fcca93bba2fd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:48Z), 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/QZZ7N2573295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a1b7cd3eb75a89e92cb59d01ca8d59f4245daf5fc4ff8fd4e13a0cf411e85. 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/QZZ7Q2551416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cc91b14f8d7c53c0c201d8d0bff8f981e47a7ed5413772d7c0c3ef17c1faa3. 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/QZZ7W2580061.
Si j'avais su que c'était la dernière fois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf84871cf48dc1cb5cfc31d2c283b21be1e91388a62e24d37ab23fe9515d99. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:42Z), 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/QT3EX2508898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b2975629cc2b160fe9ee88c5d0731caae631d03f3bf3eae486861f0685b02d. 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/QT3F42561680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844c55c315c3e97052f5442f139d2fdd41ca7368dbdada31cb2af1bbed76e910. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBB2595468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54bfb8757755e9f6135182b61da14caa9ae211d20120106bcdf8350e584b125. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3F62528302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49cafc673d673d5bf9a010903f757d50e7d4f2bf607a6f228717f1a8e9d622e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFN2512134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe339d6cc0b2e7347bcec943f9604df780d4b8df41bb17ef7306a3bcda6c332ff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3FB2546404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723aec9e88df78378b24036ca551c0104a1cd891bd51c7ae24ac6b01c68076b4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:37Z), 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/QT3FD2510465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee4ad34f5ed02cf08fc12460750fd754d0c601e433d568f014440d3e2d005a3. 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/QT3FE2537366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8215455dacfb85f7b34f1b4e99de3fd4f7c83cabc6eff99b200727f73354c. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:52Z), 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/QT3FG2516121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f179988399a70100990ab741d024f9018100e1aa4e649992148d4916a4b4568. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT6E52573072.
Lullaby for a Crying World (English Roots Series)