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 0xeb760292a0f880fab2935e88a284aafbc5bad1c98d80450f784bc3449f3157a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60139f43-2253-4c8d-b22e-d71dde552e58.json and https://artists.proofprofile.net/proofs/artist/60139f43-2253-4c8d-b22e-d71dde552e58.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 0x2f67fabe370eab1caf315154e19c0a2cb75cf9753867d13981c752f3aa5ffaea. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARF102200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9659de05bdae4761dff1dea792b7446f30abf0cf32b2ea3375a878c021b6b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARF102200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f67fabe370eab1caf315154e19c0a2cb75cf9753867d13981c752f3aa5ffaea. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:25:45Z), 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/ARF102200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d27d85a4b7f0688c0c39db8511179aee194f792f5f198f08c3441b190464585. 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/ARF102400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c3b33df15a8d17c3ec7c1576bb7dca41e73937b5f8fa943e7ced2b6a46032. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARF102400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fd72a87a4a843768f34cc2e51f237c99fc909d54c335a410ba1ca3e5e5f40f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARF102400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561a58fddc25070ae14f7eb327347b82693edd8c1d20b81252d88be934b81edc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ARF102400270.
La Paz de los Cementerios (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a4574afae16cbb59d48cef5ad327729c1608f766fc7e43d93b2aef9a93888f. 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/ARF102400339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d336e0909822ba3249166d0057ea1ea24535b636852e484a4eea16bbb38f3aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:45Z), 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/ARF102400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98538940eb3a5ee81b63536a329c0eff6d61c5b9473f1d81734cc96bf30861cb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ARF102400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c013e63e38358036b61eaf023fe2ddf96468aafdecb5869ffff22f3d4796db3. 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/ARF102500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a666cf10a42f02d2adf39b43649668f2cf1a802e7d29f74754a086986d262. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:57Z), 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/ARF102500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0f7436ae98227ac4436a61717c82f0b70a0dec66483931bc870b1e07a0ff6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARF102500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcd46255cd577aa1f05ee0ac7869b90ddf315816ed7e5eec6d8c98e068c922b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:50Z), 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/ARF102500334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f761f65e62b0746550262c38c098e6d0d24be31255d24329f1416a065d49f86. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:48Z), 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/ARF102500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce7a68f405fd03e53960a5582f80e52c9060120db95814761b61d82accf34d9. 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/ARF102500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3b53f73c2923266a2f6caae390dc7e1d89b5523f037b3c912ac7bc6efeb145. 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/ARF392121015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd85355603f178673ea0943ec17007f8b63ddc6df3497305b4dc3c262b15eb1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF052400149.