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 0x8a83b3f2de20bbb9e43a422336cdb7b169d5eb76fcd4f8efdff32176529ecc80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53adcbb3-9d20-4c4c-aed2-51b136b2a87d.json and https://artists.proofprofile.net/proofs/artist/53adcbb3-9d20-4c4c-aed2-51b136b2a87d.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 0xe0b8aebd9ff9cf480f4f3815068fd32ad74a4fb0c1f6c811a2aae2a2a4174f2f. 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/QM6N22444372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d3d15f5d8211037bd18b05ca2dc3f145ce38c6cef124994fd1a42fa4ff2af. 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/QM7282473726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5d3872a0f73ec1e0d94db2009ce41113a53bdab445bf01d2c7985ab186f042. 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/QMBZ92415097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b1e2703bfb00b541a332ac0d4e1277f6e3841fdad0c6bea3b63841b5467386. 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/QM7282432204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce55b94b13478f69972c2211fd75238cceb9c15346ad126a92feaf52e1eeda2. 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/QMBZ92415089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d3d15f5d8211037bd18b05ca2dc3f145ce38c6cef124994fd1a42fa4ff2af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282473726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b1e2703bfb00b541a332ac0d4e1277f6e3841fdad0c6bea3b63841b5467386. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QM7282432204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8aebd9ff9cf480f4f3815068fd32ad74a4fb0c1f6c811a2aae2a2a4174f2f. 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/QM6N22444372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa5aa4ed4dfff0f24aa318779708fa7bc91a03687c6c3522117629c2c2f61e. 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/QM6MZ2432916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b8aebd9ff9cf480f4f3815068fd32ad74a4fb0c1f6c811a2aae2a2a4174f2f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22444372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa5aa4ed4dfff0f24aa318779708fa7bc91a03687c6c3522117629c2c2f61e. 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/QM6MZ2432916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa5aa4ed4dfff0f24aa318779708fa7bc91a03687c6c3522117629c2c2f61e. 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/QM6MZ2432916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc580c9873e4ff9590b964adaea957f4ac02f8c879139f7dca41246293ca1a48. 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/GBMJG2304840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde703ac4c2c8c778a5b812a68854e32b63be928a8a94e1a008a8777830e950c9. 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/GBMJG2224846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b7d533bb36ea93fa607f1dc427e6c4d94d74f5d0983105423a94ba37acaac9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBMJG2212344.