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 0x3111f975f6238a6b693b518126204d98840818864ba182656181e9a669a65e17. 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/5493ae01-2265-4d4a-882a-bdfbe3f78f11.json and https://artists.proofprofile.net/proofs/artist/5493ae01-2265-4d4a-882a-bdfbe3f78f11.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 0x91b79bb4e32b46705dd086b3d7f51f3eb393f990f07bb0ae7f0dec9ca43785b9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:10Z), 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/QZS642295619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3835ef80b69e29ecbef3a2bd09b91660237175d8e1ebc8f1ab05e9330885fd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:59Z), 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/QZMHM2478952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68e88da953dacf09ff0fd44a4f8f59cf16f9a50b8929bc386a1bb95d848f2c4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMBZ92466439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc92ae63c3d02b8ef3cf1300e79530b0e38be419505128a11f977fb413aaf6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:47Z), 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/QMBZ92498400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73f44839c8bbaa566b4c2b1a089667e184993a0276943e54c0e45b5e80345a. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QM42K2433811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4516a0ffd8a032e0b25a57effb076f00ceb0d2f35d387446725a8e98c450cc0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:20Z), 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/QZS642421686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d10a95d2d8de67179e586b9d17127cfd37f9215aaff09fc963489b7abf93fd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBKQU2497378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1a034eab1006a250b4fb249db2aa17a98925aed7a25755bed7188d92fa893d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/GBKQU2497380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07abc19baf5905dc1d08bd31ec9ca6c0b5599213438574b2a2466fd9ded25fd7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLV62404492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c30a933a5f967508c3549b533487019636cab9d36eb7149e5685bfd40acf14. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:45:59Z), 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/GBLV62404494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3f3b6a95f21b92b69ea5ba275bae81f3c8d2e5029c8a8529076e8a20f12b58. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QM3DF2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2883822712b5d12a226f533459068252760c3d9e131b23d1ec44e4be9518bc. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM3DF2410819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7c450ccc37916912023fcea2334069bb62ef9875ecd197b41b766e57a8dcf. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:01Z), 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/QZZ7R2403956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd702b889ca338c1d77db3be53119207eea8351b378aaf3681e0ac6f4b1972ff6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US3DF2538880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c214e50bbe30d49fe333a14ff952147b175f913e9b4ea6497e741ab7988aa56. 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/GB8KE2507004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13194b92491d7b4a14491596fbc3b901122671ee93c42715579ed6d93b2fd48. 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/GB8KE2508003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c72e8a28c9301a9e9b08c2b3e99a6f587b0f89aa0d7d2a2b2d4d6b52633739e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:36Z), 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/QZTAZ2521648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b832c13a1a88c407d9a8d8bf4abcfa24dda7eeb784ae685aa8d591f9b35f9d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB8KE2513815.