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 0xa96bc3b29e689c69df13df613140c4133a68bab2f7ec5cc7e66baeb2e170fd81. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad6204f-f9a5-4b2e-8fb1-d3d87da86eb8.json and https://artists.proofprofile.net/proofs/artist/fad6204f-f9a5-4b2e-8fb1-d3d87da86eb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf1aa3feaa0ea6a907d083bf9078ac9390b8e703c1f247b0c61ae81338fa074f7. 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/ATM891101763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ae95a37c5de17dcaf7cd4d50fd28cfb21d5caf98335fa480c605574f48164. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATM891101764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34fc2ec166a157fe48ad40b4cfc50c2b6261206d2978600f0515783ca7a654. 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/ATM891101765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0651b754bd6acc1dd62ae62e5b7eb0dc843c0ea63d91eb289fe1569638ba7b1d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:59Z), 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/ATM891101766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7b96dcb3af58123513d54d73099202dd4b09a535df19a4132325697703bf6e. 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/ATM891101767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8065b71bd5b5e57870aa51a91017d8197bfe92d5ad4172afa78eb1d75422418e. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/ATM891101769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbd5cecdc638f431041c179dd8e7a029740177b8af4e5674b117f2b57f284e7. 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/ATM891101772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ba5fd76412b6cd4efa7a80831fafe8e9f31d306b97fed8628c16afc36c7723. 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/ATM891101773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69449153c58dd459fa5e25354a0a8ed088626f6f6aaf729c24845fd0249aada4. 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/ATM891101775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86c82557bc969319b6c3d42916d70232a46862308925875f0a13cae4b702fc8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ATM891101776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af2ad9112d1dbbe15df7693a5631955228f5d39a5fd18edc0bf09f2ad50467. 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/ATM891101777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b0a8fa37b98e4a1e95617c1e7bff3ff8060904b3f30837e3a37eb2750864bd. 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/ATM891101779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b09860fc53b745c7260e72676bd5468f8b97417e1ca4d2663909675f7e3cad. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ATM891101784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ca9a22f9266bfa7e48b6ddb219f079de11f15c115b5d3ed4d4b038e3a4909. 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/ATM891101786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d4e29f9b5832d42f06b841280a97434559c1e5edb0e8b0451ceaa6967e0267. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ATM891101771.
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 0x1704ef7576d32b31ca7934c89fd89395ddd3d8802380c7fd44caeb31d168f930. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ATM891101780.