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 0xd693ff1b47ab045ae34d0ad1963ba6661207165fb9aca92c07bb00f7dad86e9f. 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/2c15ba80-fc19-49ef-bf17-b95396f438cb.json and https://artists.proofprofile.net/proofs/artist/2c15ba80-fc19-49ef-bf17-b95396f438cb.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 0x56ba2766e5e6eb2027756daa136f1d7cdef7b6a4debc3018e29c0820665ac067. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDHM1722765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e65c9d26a9c47379939860e15a6ea745c4bb789ce73cfccb571bc5a88a6609. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NLD321900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d57d3800d5911ea47f62c26bbe1573b87a5d93eccc11382be6c13ddcb7a99e6. 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/NLD321900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29628e51c67fa3a34fff4edaee8d1e8edd405a8989aa94bca4a361a264eb08ee. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:50Z), 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/NLD321900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8e9f04259a1c97debda6599f8fcd6831155df38e9362bbc6ad44901e05e507. 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/NLD321900454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2912abbafe0daf9309997e392d991f3f6ae02c8afc6fc61be3d556559ab21d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLD321900456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a457a7bd856b61d5b3982166c07101b22b910849ac3e672ca4922fee0a4620. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:42:03Z), 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/NLD322000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8c0d7fe5919baaf66a7d9e69bfa701b978b5bb57ee546398f4134713e1eed. 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/NLD322000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc037abd7635020520692eab61090158345a9a54828b3a152f24b7fc39a15ce. 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/NLD322000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf098845cb9d32e52bb84c50af9cc49b812107fc91c0a84c8d6333ea115b3bdf. 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/NLD322000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea1f6402f987f27be561710702f657244757541c8c6be40527c64eab340c6d. 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/NLD322000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461321c535a9f15a8820bf4da1838598b05ab224377adad6c03d30d55970c13. 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/NLD321900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72c36e661285aa801fcb851623a631d1d54efb55e5a04b96d72d3931ba82f9. 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/NLD321900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461321c535a9f15a8820bf4da1838598b05ab224377adad6c03d30d55970c13. 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/NLD321900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a8f5ab81d6f049fde3418359b1e799a5bd1c14260a3758d07ff936f6028e1. 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/NLD321900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55c02edf49c5bd2188e24f44da283502a91e238bcf80c8659976120297f194. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLD321900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ab32b83e32329d32a19752a9d187b74d6d2f82693e9f6f35eb7d13a7de3e9. 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/NLD321900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7bb4cd921d320dd2a23e593a863d72f814abfa813993b16264b9c61ebf6f70. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/NLD322000100.
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 0x5e1cd9d5ebba36d2aec09e006abe4fbe035936e18dbcb4a504dc61422fcce50e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLD322100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd78649434a819d550d37408a0438d657fdefb43e2afdacc3f5fe90754e971bd. 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/NLD321800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e2cf83669111bd4676b3579d5e123815649ccfe7d2fea0b92e0d9c3896275d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLD321800260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165d1637841ba9006169e5aeeb966765bf5ad16c6233ae0706332c74b589cc10. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLD322000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9b121a31aa22e7b9d83b9b423906c9b8ba1752e0b5860bddb20883191ef411. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLD322000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367026d022d0bfb471864f5fdeda41480b880a4d24ed5196bb8d3094370a9339. 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/NLD322000009.