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 0xc7a56a1aa8e46a288f77fd4599726d94e7a02e85a0ae6eeb5f15d154b4ad1d9b. 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/9ae41059-1c79-40af-8ffa-d11fdb4e3f0d.json and https://artists.proofprofile.net/proofs/artist/9ae41059-1c79-40af-8ffa-d11fdb4e3f0d.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 0xeec0b94f2623e60dca8554952440f2d7003e7018a3ba66298c8ca9bc27ea9ebf. 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/QZNJV2045818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5163a482cc3974b26b304f7f4164f6020b1d7b576460bf62c5266e222e50aa7b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:38:03Z), 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/QZNJY2023462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a3fd4b80da837b6d2fe074764c26bef5b385b68588555cca130ccf7dfed6f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMANG2219380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5909439e5af5d3eeb67ba718999816a368e22e2fc60369474e11588b61b9c2. 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/BCD592200052.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf882489bd6efff704ab5aca45faeb0be4e29eedf9e55cc4b545d0c59827ed275. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BCD592400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a325c83ba7b3e619fb0610f47a92851aedde564ecf7a8a548e562bd3f04ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC6M22420108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe665e8b0c4762512a1a301df28e874352d45e71c8a097de1771503a90e9d4db0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BC6M22420114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e4ab1c3cd0a41945f54457d7553c24cfce22df491fe534643f3940c0a6e834. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC6M22420116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74acca25c0b1e5e82a56eafde97be54a334cd4a4fbe6f449dd13e666c2057e1a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC6M22420113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8da436fb060eefcb8961a89bf786509c66971de3d56cf0ba58427652590838. 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/BC6M22420112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e1116f5d563a072cd7da35ac9efd61325e9f5dcb5982adbb58f2c09cdb6e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC6M22420111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48b382e55622b20bf88cdbdd0ad443c33309512ba2aad73afa4d8cda75459b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC6M22420109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31da37585bb0ef073e30eced0d6dddf492593272c8c31780f7348c11ad9ff89. 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/BC6M22424390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eff8465e487165b1d7efc6020c7262f6d77023f61ec4d62fc9a9cecc3f24bb1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BC6M22420115.
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 0xb0bb9b3bf2717ba6260a5bcab37293c2bc2b3f21b0f135d5e35190701b872c1b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BC6M22420117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe220d6c3a136754fa25696c24e29ebd82e86770b28a54793764ecc9b9b7d36ab. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BC6M22420110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d1b6aab56133c2c886ef28282e700a0f20bd01887ac2d9b4d492091f93060d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC6M22502761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7234e13801b9ee31f237d60552d5f84d3a1ba95d738a447f4d8a5ca7249772. 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/BC6M22518263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d953c39e44c6670f819216bbf78a752e87a7513ab087a001908fa1022c6e28. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:23:49Z), 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/BCM9B2500956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70578fe1003a6c3a69b04ca8093e6a60eec1bbc02e03a7e9c63a8b8e760f432. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCD592300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69c2f42f40d4fa5cc76553277dad0e3716eca5d255195fbe9477c3d500795e. 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/BXG6R2100945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d66342f916d88dac0bf4cb937dfb4fcdd2cbe1105af2c6a8b83acd8e9e0534. 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/BCD592100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891c506b5bc09e33e36c6d6f41d6eccaf101d328b8ff64a1afef44d25a20151. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCD592100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dedffddae30aa7c54f01592498df42ce83221f47041beed221682c6c189235e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2404089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8ea4d054d2bbf7be4eb5e5f9e301c5b15a37774e7d3c7cde36a9508475852d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1955979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54a7a72cfc41b36f52ef607332434259659fd1717327b1f28a6467275f87bf7. 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/BCUXI2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab44c825694e5244f0f8e2e2505f813cbe0b96dbe2d017f005800677a2ebfee. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZNJV2415977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7159575a930762029e566e11f8cc6a7f171902c38c5ca425c8670068b8d31b. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/BRPRO2000516.