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 0x2cdfe72aa86e4c87fe5735cf3e6e5810ff0182d7bad55dee919fcf8967fbac97. 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/31770b42-2ffb-434e-8fd8-b2d3435af9eb.json and https://artists.proofprofile.net/proofs/artist/31770b42-2ffb-434e-8fd8-b2d3435af9eb.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 0x63ce2bca4cabbaf624d1c4b57d25ee38f5a5682a65436e7e26d111b525df80e9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR59R1678206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b1db73314dfa9d1c1ef7354ba278e78133ea63631d8e804f85359c1a35e9d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:00Z), 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/TCADD1709498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c55b4ed80e4ffd28922b7da48057f4d820862da66ff825a8789c8e1a368c60. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCADF1767959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f97127523ebfe20e7fc9bbadf8295a3fe14107c1d0bab084d3afa14a2f1622. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADP1863451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1374bbf3680ef2e0cd25341c57812d2a82c568f2b8213411d6017f03c5056440. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADW1838389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc992098a7ba10c8be3ddcff621c86f174ea2e51556e80226f3b5d25271aeb0c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEA1837579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0db3a280c0e7b801364f0adff99a0d8cd43ab18349b6da25cb45a10d00f385. 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/CH6542060478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b583dafe8e7c36f54ef10de92469285fa3552d09afeeffae80ecfef786fac5. 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/CH6542060477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699e24c855dc725201677b2147a835916527f80a1fd4500fbe316a2d7652149b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH6542060483.
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 0x3f73666168bf17df3df50681c5e85d8b9f621542c3b454b24a2b43acc19b1f1e. 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/CH6542060482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5021a8e2c1de3a84db230798a70eae8e699569d412a2297594b626417d0bfebb. 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/CH6542060481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e48471ae4b3c1967995e34c2cdff01bc13b0b41c9abf6aeac54ffbe086fda0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH6542060480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba4225ed53aa6d29e7ddbd81630e4741ac2937baa91e81cbc22c8a2676c6260. 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/CH6542060479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002c8c7ac6497ce0b5d369950080729cb6b431d63bb534bd5b63a2d790ee161e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CH6542060476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7eb3cbe65100401962c9f1a8d49419176190b4d2dd517d6af475becf510170. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZC62330291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb8cf6f2715199232fe5b49084e0ffb01ca627c876398877c18bc023d08215. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:52Z), 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/DEZC62330558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bb49bb26aa9481f51eed7dde43fdc9e4b003a0385ba7cd804cdc67e44d031f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62330559.