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 0x22b599da9278d115b8bb33f307c3fa525933fdb319048d628d8e3905b2fc288b. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9f9d063-7187-4d5c-abae-dd4d22e37c11.json and https://artists.proofprofile.net/proofs/artist/b9f9d063-7187-4d5c-abae-dd4d22e37c11.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 0xc788f376d30aadf66835736210d51971ff3913f384df8fca413ef3801308bb23. 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/QZHN82047759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608b4a1cdecd86dcab094910c2547569a95bdc17b32f0352ea2a5a9b00a8bb50. 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/QZHN82047767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bf82539c221c8a987bbdfb01ce67a2082680093d1ca905f495693ebde59645. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA82068089.
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 0xf34372fe3fe392b6dcea984865369fe25aa6d9f51086784e1fced58dd923138b. 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/QZ4JJ1861807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c7ddef8e10cd5e3b035ed57bad8e42ffc8c0809a50c1d4034c7a5617a2ef17. 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/QZHN41937478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960c8294b483ffa18abc98af2a4fb24649c11e8ee449a6072deee33a632ab0a. 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/QZHN41937492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28224766d04ceda56b10f94dddb16565051fbce93dc758b1ab4b4b28726ce660. 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/PLB382200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2810becccefe4b3f775aa573dc13fdcb099f982037c9435e522d021fdafa1cd5. 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/PLB382200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe381029f962a1c42be3c227731f935dfbba58a102c3c591457f0aaf7fe1b79d9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLB382200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ca00ec863cad7672d85421a4730be46c1f084bd430245d131ad0fe2e1aa412. 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/PLB382200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641f38d3fc6b79d236bb83c79dac837f7f926193dab0d8c46e1d697a7264965. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PLB382200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772335578b83ef8281fd4845dc2a36df26e3542fefe84cc9f4cb5ac0e23cafa3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN41937481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b87281c208a0c05bd709728021b5a557c86152b5600cc3b29d33dc296f8ec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZHN41937482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9fec58438676983f75101676792fe451b0f71f4150d660b9588ec8f3d95bfe. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZHN41937483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3134294d3ccf1b46e8474a70bfb91d9089c87f91e9922ff05884efb3f802a6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN41937485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce807ebf6a3adc7a0cba096b5ff7646462ba5323f061db3be26b3aef6c030c1a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHN41937486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0748e23d0f7dee233e3e04a3f2fcaae0e88aa9f341dcee6aab65965e5c25e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN41937487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0bd5d3e18f8a76b980f06ba66ff4e4227075a18a4aff26cd04dbfdff48bc02. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZHN41937488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1905306a1febcdd14a27c8d726b9482b5fd136903c8162cddb2724af0db0fd9c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLB382200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a5b6cc928a279e03e7faf8f214542ef1f8751f96f317e6ee0064af738fcf7. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/PLB382200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070b6b05b03fabcee52f61c3efd224a2f1a0ad112e4d0baf4e70591103515d65. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLB382200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca8e8da75b631d97b5855c474d33465c6f87b83ef1ff51742597f912229175b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLB382200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6695cb72b015ce23cd2b9c0eea98006e0880a070d0978aacad7b9ce6706682. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PLB382200282.