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 0xdf6fe2d5d0beaa66a562dec531faf973c08ac4d0cf6c3ad73c7510c4aa67d264. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eee3a93d-a125-44ad-85a3-ff5bc3100bae.json and https://artists.proofprofile.net/proofs/artist/eee3a93d-a125-44ad-85a3-ff5bc3100bae.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 0xaf226924a4ed41a9cce83195664539d271b77b8de7cd2129a695f18bc139bb0f. 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/TCJPE1688751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4656e5f1edbc69637d3fd089486f14f1fa2459dc391487732a6eba8bfd9b5c. 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/TCJPE1688756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf50aca8cd7ddf37c6ac9e4a579c877acda0411d187ef8da39b93eb4f7c738f0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCJPE1688760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683ea18fea620000cbaac6280578027ca9ab9f7d5006b7d0906f65a87e65bf85. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPE1688761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de69042e64a777fff63aafc6c9fc5ef48795a865e4543a9106e3a5d0ebde5cf. 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/TCJPE1688762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e526421ecf45c3a3f21aff12b6b15d0d6b34b78e0015fff446d3e05c5f9735. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPE1688763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a7ac6422d72ec7067c5433e85af9f5ecf34e970cda51842609bca988b9c9ac. 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/TCJPE1688764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d9cd249bc8546564514ecec2670e78716e98e9048c7a240542cb63f13607c. 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/TCJPE1688765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5cf1c466379b0392ae8bfd21a6f33417a825721b3fa0953717794887bb396e. 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/TCJPE1688766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd043afc0ffb0b75a1a1cdfc4f289374db56a8277d25be7fdf0403a150d9db522. 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/TCJPE1688767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711e788a578030aad162727ab2904d0e0769d13d91d2c5cb67e601b44684f5f0. 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/TCJPE1688768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb20fbd7029395252f84c9497f2d0430e1a30cfbd243e7435c9f42fe93b308. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPE1688769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e4370c07dd61819077fc1aefa3e1c72de5e6e2743d8ed2d1c6fdc490a45e4. 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/TCJPE1688770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5113541719e6f72c2118dac026cdd47b46b66761d4aeecca7dbf92af3065f8a. 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/TCJPE1688771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fc6c1dfe1fddd14df88d48081d01c7bedec23776b653bd507c775379240ff2. 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/TCJPE1688772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e8cb147570ad9588c7313a6c79ad5c14cc8701cf84f14d249f9971b53fa8f. 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/TCJPE1688773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbf244b5d59acb20e83925c7c94c77b6cc3872798b54b6fb59dce15e003cad4. 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/TCJPE1688822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a12de1c632befb59e7e9a27808f3342c31af67ba6fa87fbb34c821a7e2e21. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPF1729511.