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 0x81a999b9faac8b7786bc2aebe59e7ad75a92f1b72c751cf2814fabd511d74c71. 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/8852fdb8-1dca-4bdc-a03e-7befb5c79253.json and https://artists.proofprofile.net/proofs/artist/8852fdb8-1dca-4bdc-a03e-7befb5c79253.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 0x73e1d7947133c22750811afa982e46a7ee946958b8f239318c5e9215b4438f8b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG731613792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64624d76a4dba84287611186d7d26435650163584695593c70a3d6354d5ca4a9. 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/FRX762342261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713373899fcbe387271f7d777fa0f6a3ce726a944fdc7e6d07a7d3f8c98e1172. 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/HKG732232034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a487bd127ddc45792b2cf8e9528acee9e1e66ba14f467a7a999f922b43e9d04. 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/QZS632151595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abf28d72568329b32a72e85abf936ea23b99aa9f82c23d45f95ab9781c2070b. 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/HKE022215027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95675badd2298f543f9ff64d36de9a51a72c4623951e5a8f35c7a324452538c3. 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/HKE022215024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2d4f607139401c5ef4775dbf540eba62410e76b7a3ec0bc227921ebb94c2ad. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX452277892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892350ddfd18cc0d0263c41c76aac22cd528d799812f7445e4703fee2aeb53e. 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/TWU712105863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd794e88a1c61f52198eebdb627cfb8f2928e3f9497c1f191f2740d3aa8208e. 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/HKE022215011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3116f5247567a4f1a12af1483001f33e3cb787d44bbc684ecab237c46861f2. 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/HKG732120094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efe1b0fe65322ee0a3ebce16c8a618db80f2a36c80064c7639f30b6a8384dba. 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/HKG732120096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0c92a3036f429921063f15ac869e7d76365f54a21ea965bf6636268f120833. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKG732101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5329f8f90240c2e6f1833bfe0aee0cf23257713385dfc9420a8599168ef8ef9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKG732101067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a574015a17683795d7fa56124d485f783ed194d68549dcdc04c0a377879b66. 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/HKE022216638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e58f25b456fca3797e92bc7eb42f620b02b0614d66459261c04077aa20e185a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732030441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6793fa0755b8f7c2e4983e3b2ab99680fb7fadad2b8d511ad04b0f11517a5e5. 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/HKG732030454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8d0de50b58e405e13563e1a5835781039895894bcf985e410b05341bc17eb. 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/HKG732030452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580af6adc14a36d3155e43e9347b4304a8a932e3128c68a3310330ad73ea8ad. 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/HKG732030453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40b002d158efff39698b0c77b018af0c128345d71d81be3e970d56f0d957ba. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732030451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320808af378fa0c1448ae3feb6bac462ae76aa5a4397bb511cfc354f31102879. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HKG732254176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70719f957ce5824a0fb5632bc0d06698bce0ec43b5f1e1325881e82639838c9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKG732109746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5024ba18675737f209c2f128187326e56f25cedfcdcbef2f687383be63242. 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/HKG732023603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edd7a7283586beaf32f8b8163b0dccf2e57fa5d51ae8757804490e297dad29e. 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/HKG732023594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4ed6a907f1dc8f7387a073811188495ef05c777f46bdaf436a561bf9b77eb. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HKD012419451.