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 0xa8bc8913d66b5259d6184bc811842270aa58189c3e37f7708a5a437d5d5f168c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2214b8c-043f-47bb-8cbf-f99909fe4829.json and https://artists.proofprofile.net/proofs/artist/c2214b8c-043f-47bb-8cbf-f99909fe4829.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 0x220b0cb8375068b26eea4b207baf78e84d7ac4a634c3a4dcdfa8d086761cb84c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X42229970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f6ea97682dfc3d88aa825d7260e26d585478ad10fb97758be97ff75d6f4cc2. 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/DGA052445916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a65cad26272f6480fe961ce07574110d22da9d20b8edf354e19e09266c0aa98. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DGA0H2388138.
Un Corrido Sin Mentiras (A La Orden Pal Desorden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15347ed4e153474f8ee4af309fb52b986777d38d1d2657921c94e31dc365a7de. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX282323226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e42df4b983dc331bc74e91665bddbd4e7d73a713897cecffb2ee75a33b5c0. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR59R2317094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31354e48ecac6f5fe3f35770fa893d6fb38a5b8c10c880e56436bb5d86e3e99a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DGA082269247.
La Dama De La Raptor (A La Orden Pal Desorden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b9ab839ec18c874c68da2810cd4cb6105180070950c4e7d7e4267020d62413. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX452201382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa236a8a0dae426b75c5f43629ae07b489dac5fe02609f0a1d350f4418903d94f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US3DF2207106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146603dc06c0f867af9382b40a770d2aa9a59a64df59284a5defa0f22870e664. 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/FRX872166505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259e7af94cfe98d658b80e91b2c1d3556f620e60a55117962e5fd9fa20e4f06. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR96X2135832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8727a29aa31f23046fb11d18bf9a363d76de2903ff165c539e240c285842b6. 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/CH6541675697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0055f8f7e36a803ee8a38b659b9bffd0e0b4643b05b47f9a20dc1199c3c5441d. 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/DGA052034824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88055a4400cc463bea9b243707e7ae567489ee059f9892a83c6e8b35ea69f1b4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRS182097795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8095b1a2688c5bd15129173504c676a6205a0cdb3a3aa7e90179af285fefa565. 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/FRX872033693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1473348bfb593f1e83aea6b7235258b38e0c5bce7def910bdcead24a05afdc41. 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/FR96X2006413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295873b14b81e0583b0e53c8f7419b486630b4c9c6e23e61a66fa35e671da181. 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/FR10S2097589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2311dd8991611037d7a36908f1cbdfea9003fb5f1b89f3b59f9d2cb47ead2f63. 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/DGA0S2429291.