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 0x7857f6841b8c4c38c9bd75febafffca85e5c05567e40a06332d8106266829a79. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64564934-ad81-4da7-a9f4-82c599130376.json and https://artists.proofprofile.net/proofs/artist/64564934-ad81-4da7-a9f4-82c599130376.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 0x5dd97e63dc84c22cede17f589f7cd462da8d66ef0931f6f99c961896176e347a. 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/ES71G2334646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc269fba82585847c3b0a101b9ea3198ff7d6d3432456c4ff2266a7b942d5443d. 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/ES71G2334645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931eb57fa9f9328ebf48d8afb3623c7e9b511b75120ab57787c2b4d4ed12530e. 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/ES71G2334647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bf96e914b7a9e506378fc26d4536525fb497146dc268b0d3b37c24c0bfc3a. 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/ES71G2332811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85398c249e224acc063eae45f6d7def78a2e139f4d4f554b4d3569eca3dbc92f. 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/ES71G2332812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f511f417241f977c575627df0888226764da00c7f56a20fe52b1641ed57aa. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES71G2332813.
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 0x9fe4353af682d9b1c6a59d1a8050d6dd3eac99ebf1d78dd18f8432fed81555b3. 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/DEX262101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae0a3094bb6ced3b5c9f9b54baa090a2ccf69f9f79995865c8e97ab1382be38. 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/DEX262101099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ef52295f77c0b478efc7502e2ab8242cd48fedf4e44e26093daa80260e522. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEX262101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01db5928eb5aa1ee7333d3c167a46058360456296760d193a6368256cd209a0. 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/DEX262101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11274735eb95bdf0f230c4a366f915230d859721cc623ffd5d96ea1afc75938. 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/DEX262000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef925bbfd00d83210c61b1f6008daf2f2e4ba2eb3607b1a65173510ff374715c. 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/DEX262000436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1526c00db8359ee697a93bad695cb2719f29ac311dfd0c8b1e1b63cb31473582. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEX262000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1fe64de1a9298f3986a1aa6ad45a749339421774a844c61c129c9a30217eb6. 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/DEX262000438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683918cd40054c3a61f7339d56ceb79e4d16b951cd3ad0161edfb68412aa23e1. 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/DEX262000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd167349d88f9dd6c6c5b0def490a2fe02bb1b1e6bf9fcbb8e87a84cb301d798. 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/GBSMU4658931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3923fa9a98518dda5411f64f509334f6a70e474c82a128965a3f5362f15195b3. 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/USYBL1400988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723ef6ad6bc615e828687e3b998c4fa239a96dc5e8d5735d81a787acef53977a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USYBL1400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12405aaf2f496ca27a3527917f0dc59f1fda1ee727fa12655fc3937649691b6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USYBL1400987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb105895b0221ee5f9706dd214ca054a4b1068f230199657c1bdee089492a9a36. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USYBL1400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080119db0028fb80544ed64b4c7cf361c224b2aea4fcf6be1dcf0e3fbb5d4419. 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/QZWFJ2440921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ecd072ae86056e05c5ecfaef981917c530dd9bb78234af5f41b87d0ab4867f. 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/QZWFJ2440922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580049657c4fe212d3ab7ed1bc95444a2f458c5c90fdeef03fff42dcca1e480. 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/QZWFJ2440924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb407c2306bfc3a6d602a421e1bb9ecd86c5b993cc62015556b3629bc32a186. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZWFJ2440928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6923aec4f7e89b6e89a7b06c43783a50c4760092ce3318d88423e8405eda16dd. 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/QZWFJ2440929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f51a83971b2b7433af1a50c39a35df5a0e49b674ee20cdc6f2ec8f7279320. 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/QZWFJ2440923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65365a03de99b2b1aef42d7a3f556bacc83fc5db6be30bb262b7c2b18fe8e80. 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/QZWFJ2440925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e73eb7b79c3fc4a6ccac09c2965fa6d58ce635b90fa2e675edd18a0de4dcc. 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/QZWFJ2440926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84198a6532b9a84f698732cba3c123682c17c33dbc28e26a2c1e49d6a18a5f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZWFJ2440927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c67844c3c645af8fbd46ea3b967930675409d1049d590112e60e651db93c64. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTBD2412534.