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 0xd6ce700271b0baaf162fcb75acc2212f78e3b15c0852c8627466a77034724fee. 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/1c8b6a81-e247-4e7a-b71a-c8ed3449b919.json and https://artists.proofprofile.net/proofs/artist/1c8b6a81-e247-4e7a-b71a-c8ed3449b919.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 0xdb1e5215c98171ae82d18fec3a40cd0796fdcde6f576c1bc19d5d5bc23119d19. 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/NOADG0532060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ddf581d941e4dd3a0495273b667d0e3982b948e9a2a9e7ca6873e5bac2755d. 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/NOADG0531110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8900c86c822766346377178718d27701c1c55eb30b2c96b40578040d5c451601. 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/NOADG0531010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23468b3f64a417c86e3e35c419b89a2310c1fef4b7b52d67870febc74908a0e1. 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/NOADG0530120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea25632e1720298e7376887d92b683b79468a68a9ccd30d803eb9646f4c9283. 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/NOADG0534010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c30dd321e16df6faaaddf64abafae5ca26a1ab5aa56293e9588090a8813e1. 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/NOADG0532030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5dfbd8ba27ae57aa7fcf2a2e8c57f57a1bb9665104d44ce9d43249feff96c. 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/NOADG0530140.
Når Jompa Spiller Tuba Med Rumpa Ne' På Cuba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cfc7affedaf546ef90202d8bc7f1ec3bc4ea842e2e922dcd6bfd739627e402. 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/NOADG0532040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa751be353a2003e94cbc3e25a95e18a2158a771bac68e592085a2de91e22b80. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOADG0534030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465c5af27a506e35268dba335327f309212503fe85445665af4e5e70579332ee. 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/NOADG0531120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c23169899f2e859648b1197de9299a9a89c22e419d60ce5920055353e2e9fe0. 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/NOADG0536010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea25632e1720298e7376887d92b683b79468a68a9ccd30d803eb9646f4c9283. 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/NOADG0534010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa751be353a2003e94cbc3e25a95e18a2158a771bac68e592085a2de91e22b80. 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/NOADG0534030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1d30e32d0562f960ce0ab98c2bfd2501f4b1a42dc02bdd3b25558a87c39f58. 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/NOADG0534060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1606d6ed619753301039720f7aff0b4809cf765e6becb6d83beefda91260b28. 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/NOADG0534090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e89dcd67de030da71d5231479686e5bd055aef37a1bfc5d44d2021bfe2ac03. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NOADG0534110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92f9a352d323a27e5dec86156770e6c9ab5e8be5b00f6b6adeb86a103d6d301. 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/NOADG0535110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ca5d37cba62094cafd46dd8208b8d77a1fe7bfe5deee80ea4b6f24be32f9a. 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/NOADG0535130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1c5923811953dbdcd5face5df0b5eff1d4fed0444e55b049a03f66f24fd0d6. 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/NOADG0533090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a63eeecf79c7040d432e89710234fca49c98bb156b5fb73037725340e6f42. 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/NOADG0532010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c30dd321e16df6faaaddf64abafae5ca26a1ab5aa56293e9588090a8813e1. 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/NOADG0532030.
Når Jompa Spiller Tuba Med Rompa Ne' På Cuba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cfc7affedaf546ef90202d8bc7f1ec3bc4ea842e2e922dcd6bfd739627e402. 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/NOADG0532040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5746b8a97cf060cc63291ac541364b7b63c7e7161c8d30ef9df502580ac04f4a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:49Z), 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/NOADG0532050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1e5215c98171ae82d18fec3a40cd0796fdcde6f576c1bc19d5d5bc23119d19. 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/NOADG0532060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8900c86c822766346377178718d27701c1c55eb30b2c96b40578040d5c451601. 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/NOADG0531010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac8ecdb74abc6dc363a4609c8ec7633dad267288379f1223e0fcb7b963945f. 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/NOADG0531020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ddf581d941e4dd3a0495273b667d0e3982b948e9a2a9e7ca6873e5bac2755d. 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/NOADG0531110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465c5af27a506e35268dba335327f309212503fe85445665af4e5e70579332ee. 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/NOADG0531120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f7859e9cc2f8c72a6513de113c675192ba19fe2b039f021ed6b94cda9b0923. 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/NOADG0531150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec713921a8ad56280a0adbb4ac7965fdfc8cc42260d87ae44a7360cb3cdb274. 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/NOADG0530090.