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 0x0bb519610540e40c9facf84fb8f4f5d65c7f15f7baaa5cc8f648b1d23e16b589. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc536afe-4eeb-4723-8002-461dae36f920.json and https://artists.proofprofile.net/proofs/artist/bc536afe-4eeb-4723-8002-461dae36f920.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 0xe8ca33b2eb572839dd3f1e5e0c479f239d79390926f0df7eb0e3f933483d7e2d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLR2476018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb134f04e2ec06955d4ee50179e86f09fd9379c88120516af8cfae5a0542ae49b. 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/QZTAZ2469492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f444a0470136730c778c5c624bcbda2c265e2bb7cfc561e474da51aedab8eb. 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/QZTAZ2469493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca33b2eb572839dd3f1e5e0c479f239d79390926f0df7eb0e3f933483d7e2d. 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/QZPLR2476018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88486d1c73a08b14af2c7f9a1f5667b9ac3af909f15de99aa528c62cd1d22aaf. 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/QZZ7Q2450571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7b54530c3d20fffa32fac1556ab14448b98d367a2b8b5eccdd89bc5bb0b3a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ7Q2450572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143f5be9068d6ba28096d404156b1d802c61295561a0a61d8ded424abdd15b5b. 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/QZZ7Q2450574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b542c4ed5294c61e86246ffc69d94e5954e452f7a7b6ac0cd91048da1a86ee9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:46:50Z), 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/QZZ7Q2450573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85fba4444834d34d433151be19adccdecbf51c115b9dca64aae33d14b79b29. 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/GXF9Q2400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c95494946ebc9c252375adf510847c8f7fbba79416f5f6ef52b7b9d6948a7. 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/GXF9Q2400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac14b36a54e9378c3677f87eba0a7353ea3eeab2d4ef297bfeee917ed514ba7d. 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/GX4R52463532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad758b1dbd59095dc6a98a7d093d99806457aa13be5609127224fb24d3c40d95. 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/GX4R52464818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2ab55c8f1fa4ba77261a7cc461905020f2b31b664ffc30d43224baf54c4ee1. 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/GX4R52480958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fbea96cb3f96671de87bde83b0dcd3d50ece93bb0710164beba27979968b8b. 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/GX4R52409635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137a9af7bbac67ef656cc271bb536a91a6679869b313717a7ac3bb4b80033298. 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/GX4R52415404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788824a5b06e233c657d0d2908c20c271373e4ebea9392fe86b66adf290991c6. 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/GX4R52432047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de78ada88c80c180364448e5a31af9fff0aee4f90871ebd571f81f14ca88d29. 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/QZN882533539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f479604afaa542255d44b1e6c8779fd3ab56aa4bfd9f535731445a24aebbdf6. 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/FR59R2588945.