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 0x020eee9915e2999c6b2a450ffdd1cbbdbce925f5b641a879c7dc4356d190d8f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e9a385b-a725-43e8-9d49-419bfc81b980.json and https://artists.proofprofile.net/proofs/artist/8e9a385b-a725-43e8-9d49-419bfc81b980.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 0xcaa89b03048197598c7d90fa337e1d53c16551fd41a595ae57a3c98513828c37. 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/GBKQU2467388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2ef7b4c2419bb107f30bac7fb64f671aa7f9637c6f7b9c6cd2f57ff825dd2b. 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/GBKQU2467389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d3b4d19905a6abaa22e4d94a659412690bc810478f19b30b73dace4c6ee3c7. 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/GBKQU2467387.
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 0xa238de6a7184cbdebc0e6a79bf2133c21e8e5a990075d8ad5e1dbcb615633fdb. 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/GBKQU2447184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b0ac38cec85aced623c6f31c857c7bce5cf7552c698853272f5a2a5ec9c3a. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBKQU2447185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61370c28730b0e182272142e0ba73e7d9e0b52af76104bf726cdc343c1480b70. 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/GBKQU2407780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5894912ae5a42ece5ccd56550b49aec496bf5eb2d8cfd11d749c85429ed0fc7. 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/GBKQU2407782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf974a3add329ce23a1fbf7d73cd166dc2ed13b0b0a62503aa8eee7636f549cfe. 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/GBKQU2407781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81bb474c13b9131f7a1e829cb3ada698c0dfd2b024129764607d34a61e86e51. 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/GBKQU2326733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc841f6177443597d0ae29411945db2b5f774d26d2a45c7e146423cb041fbd7. 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/GBKQU2326734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90ebf9da1b4410aaaf7986cfe475b0d6e1878c2b619c430f87fa7481a7bc3b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKQU2326735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17eed7e1bad4485a16b76b5f36a9409f7bdb8e3b7624e8e43b8a3108a99df52. 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/UKGAB2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fba1549d91c6299f63e6cd2f75d6b798e036d6566e1e0c637ffb9543c6e240b. 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/GBKQU2273361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ee1e0490036df52eb25f468d4a4a874b414089d5b0f48be1e65dbe535efbd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CHF512200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c446f83474c2c4bff057ee4c5946c8b65f19c33032d5fdc459f52bbdc946214. 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/CA5KR2200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d00b92ea35c261e12ddd723384828bea558137524c6ddda5b79d257e2ef2a0. 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/CA5KR2200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10642ba132f33ca8e0bd4cb32ae0140a224fc4975a1aaf498623c581139dba. 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/GBKQU2159144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516465219ca4a74ec0d6e10a71e6876bca482370539fe91092334b1c2d407109. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US83Z2048337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed023193ee5711a473c0367dc4423901ce3a033e93fe2ddbc1da49717f7951. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/US83Z2048339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84537b3e0c8c2c131ec8997792cc2c6abbf12ab302d71264110936129991757. 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/DEKB72056164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7201acdef2637461fd4512e4294e02db1a531801e9b755dd54b9f6f7e1e81b8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLV62006905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fe32c07c27dd0931da527c290f76ad0622417dd46b5b174a789c802ab73b4d. 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/US83Z2032405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bec1a309ddc82bb498064f93d061185d36dee670b7ca2505ec9d976554cca5. 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/DEY472085585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867459d256530e26d478da152c2cba296d4649c495f296da1a822a04cc4a705. 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/CA5KR2038843.