Crossover may refer to: Entertainment Music Albums Cross Over (album), a 1987 album by Dan Peek, or the title song Crossover (Dirty Rotten Imbeciles album), 1987 Crossover, an album by Intrigue
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 0x7fb733dc7b06ed63d320d1d72b4a58d8462bf6d5e01165d15a798887dd1c29ac. 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/b48c0c28-0fbf-4040-b129-cf2aea1bede5.json and https://artists.proofprofile.net/proofs/artist/b48c0c28-0fbf-4040-b129-cf2aea1bede5.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 0xa97d9184ae46ad4bbfae2d5a2e0e1d8f61c35360636070ad3a350b8555e8753a. 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/TCABJ1295837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932cdd68efa41eba561dca5cc4c842b41171b6c189245bb93e745d7b7f02fe1. 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/TCABJ1295839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d1d04293fdfb83b527ef449fabcd87544d5a90d9e97145bcd3657e869e5f42. 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/TCABJ1295840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5394d14eb218005c3a70e5ef2ca5966ce6d0302eb824b521cc5a3a4172fcfa01. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCABJ1295862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ad9bd744f6ba924d165c990b99d2301d030548a537ac57eccfe3ab01ff565. 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/TCABJ1295870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6df89d00d091441d4824340055cf99eb4a8ddeeb511a08851f7bcf19bfe3da. 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/TCABJ1295875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550b41d83def72fa42d3b51f296cefb62530c7d5ec451ed87349d77c4603e37. 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/TCABJ1295878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb940b22e2d5d53e5f18a22d135ba0081511586bdece7f76916306e5c7dff9. 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/TCABJ1295884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93adad1b7d2cfedacf11f9b052c933e44079edcbeb9eb1b8ca6511ee7a0ec093. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCABJ1295891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5acf6e2fed7f8d8d54194db4a047f700cea770e5fe4ef0c72c20b5555e6a212. 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/TCAFJ2197060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84fd82ba3de21ce49566be69bc06147ccc48ac9f12230a5a4ca948ddbafaa87. 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/TCAFJ2197084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5248ab59733941c1bcf47c307d6b96ef1e32cb51702e7bed390335f94b8896db. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAFJ2197113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3094e70fe95c0d24b7a7bc0e944bb58218a667042cf516eaaebc5c5ca8a6642. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAFJ2197139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf617ce041a93b7a4fd75c55934b3d53bf2cf0cc6b09ecded86049c1ec547e2. 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/TCAFJ2197175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b6b6c5568223fc64870f80e654207538d7942ffdc10fa62c41f6de0a4afb9b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAFJ2197202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5feeb34d28ddcfc50a7381b3b3466e86a0592a7d10378144a4befc37b81d90. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAFJ2198506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62e0a2ed83715a858d4df2ec3f40ad368f02495c99aa0345c14184c51ddf56. 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/NLF711305752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef2a17ff3fa0746162c506610decfed8edf96ff5b8ca1f93117ceb14ba2e990. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLF711305758.