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 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 0x089942b59aaf5829dacd142485ba94be046538a0097c05e67316ca38c8ea6cce. 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/90fc8df6-5823-440f-a027-05a38ea4f458.json and https://artists.proofprofile.net/proofs/artist/90fc8df6-5823-440f-a027-05a38ea4f458.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 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 0x6f8173b4b5aaf127a8156da72c580df43cd952e0f41d0c76d504630fc431db8a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MNA032200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fbc92d391db949ac5658f13533996f4ace57718bd65e617082d6159e37c2b9. 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/MNA032300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81262d54d2ddf1dee86f108e379f35d40d72b83f09f24fb1ff83cc9783e5c47e. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/MNA032200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab007986ad9cfd15f90f7b039620e6027acc1b5b7c87629cb31ec3e288fc0f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/MNA032300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e94405e7609c9af71ec2912a1d2852e23d3c6d79e222aa3d751a205568a608. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/MNA032300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5fa1ad75aca90e222861d1f6784ca48918dde7a451a159b4fbbf52b992e313. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/MNA032300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d001ccb8dee92b94a26359ad53ef0305657a901f995b54765a31d8940f5803a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MNA032400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f873fbc71fcadb81132d09ade603d86cefa43557030f543394b866ceed4824b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/MNA032500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367fafa0ebe9ef730bdd389b6bf7e91166fd919b68062a27e419e0c0b8248b65. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/MNA032500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d79cd2e6144ebcff5025665a8e909cdba58f1d29a7e80e09b48fdc3eeca6939. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/MNA032500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca82922b48e4433467713f6bc2863d050acc67ee9b914675f0311db044d1d5d. 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/MNA032400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20104fc954e963f1753f033590af8eb58ac670dbd3f6446904f82ff7cb82f54. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/MNA032500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de309cd7b791b51efa8035edbcc2a507f9430bde058c38061383136ebc26a87. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/MNA032500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42755428bd3b2f8c3a4bd626f8d469d4c2b3b2f39dd0782718d00aba1f647046. 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/MNA032500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447bb6584b3e673ee4cdb6d5aa731abe7b437ed4576784d8db22a809c1eed8e. 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/MNA032500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed26b875c971e651620d3da9186dc105ff6520b7fa6fbb083ebda75f606e68f. 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/MNA032500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74367db09170761188016caaf577c58c18dab55088f0eb8adbc8981dca94de96. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/MNA032500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8462e7036c9f8d60a428f71507ef3b86657fd9a3ab894f5c4b59f8f9ed7f923d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/MNA032500018.