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 0xe1eea4444fb1ddeca3ebc26896a291d1ed93fa5ddcf7620959cd153258c7c18d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b54771d5-fe93-4996-b9ef-eb9a4f969836.json and https://artists.proofprofile.net/proofs/artist/b54771d5-fe93-4996-b9ef-eb9a4f969836.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 0x72a6a0cc1f992668f026971fdb1d0929568428b78c329606bc1a44f600c68dba. 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/DEA892400000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa888d87ec6e505131b0dce6cc747e15f39475e0a1f06e8b4a56488ea92799. 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/DEA892400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a194f4b8b6feb0f79ac2911c4cb88c7cfb781b4b6b5881d5c46e1b4aea081fc. 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/DEA892400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789842dd95d186feec9b48dddb6b50436c5a565eafdb7d804ad04b487952d029. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/DEA892400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7b68377b85c8198ba68df80fd2f28f5941957e0c7a7c869f578738ac2febca. 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/DEA892400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7833f84f79680d458ea27487fdea59ded80759bfa8a30dbce34b769a486afe2. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:49:55Z), 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/DEA892400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534b7527a47460b354a34398471e5abe71f2627cab826daa02509d766ade20a. 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/DEA892400006.
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 0xc240ad0a732a6812d53bcf68e79c47e1202acd4747d015ded2fc50a638ab88fa. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEA892400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95edc0d39229897e86ca793026e3de76aa590c2fc9bd5b5638f5b3ec967e6be1. 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/DEA892400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce36c16de53a33085e653cda8b24b41108fa73b0012677f459f7f71b7265b6d. 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/DEA892400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8688e67f545e739b0ba65d7bd5a24e8cda5936fe0f283aeb0ee42482b8dfdf. 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/DEA892300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b64f5cc679834af09aaee32aade836fb4e64d03982db9f569697a0ee9ab39e9. 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/DEA892300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d10f917b4a381e93a2e77300491b0e38bd3702950f79c0d6aa1e9fd959c444. 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/DEA892300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f63c71b62c46cf3b94f5d9f81262ddffabe761c38ae1e1d5fa39b5d3e35b6. 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/DEA892300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a9d7fe72207b99da9cc83101ecc6468e2d4c8018129cbb2c289907b9591c87. 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/DEA892300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c4a4dbd4eead50ab7f5891721706d0be39f22840a1761b9f60a4c995cc7bf. 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/DEA892300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8853105f3d5f34f034ca7d51245cc0f89443e4008ca1b687e4256bb3f12dca0. 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/DEA892300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d01ca98babdabf7ba7e5d6f8400ff99421bb8bc22cbc5f72019db6bb1a6bbda. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEA892300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22dae1e2e73de1046e52ed6d1016dbbcccfe4ce538c09f26bd75e094cc7a53f. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DEA892300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a5c22cbaa3f0d0d843202cdf1d2265ab247c950ffd2573d1da1ef3f4235859. 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/DEA892300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248caac0dba9428b9a61dd16b0754a1843d071f6ba289e293f1fa985373f0065. 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/DEA892300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e266afd501dd7b676b52ba56a6fee279a46b7a173013df2c73c95b1695117. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEA892300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc699a183b429b1b8d75b7054fa33835d26901355f90e81790dde73ac9f8cfc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEA892300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939cc11e8df313ce7b3058a3ed605e32d1218a46495371b63d9a67ed28929705. 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/DEA892000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8460b78341229b15328dbdaa44fb53c942d4231525c674b66a44bf5b3a41238. 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/DEA892000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfe0c234507b19992ff6e000edf59c90a767c531f8faf54962ffd9a95c03edf. 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/DEA892000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f9d005d8179893a7ec9f1f9ea3eb63627a610cf029f9b469bac3bcf12a41b6. 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/DEA892000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb60919eb14ae68fee0f227b3cd353c1c043b6949966f3cc07e5fd1df31d356. 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/DEA892000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4592c8523d8cd0fb631b258003168936f8f38a3e230befbc61c9599f8dbed4c0. 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/DEA892000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5cfedf3e1c888a25833d69b2eee09098b991cd562e41367d75988750370a7e. 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/DEA892000167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f0c9efd3cd4f574a66122a6cc3ee652533cce6d2c1f51429e2f928edb0d6df. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEA892000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b04e9efacd9b9d542edc5119325c1e43cbe14a6a36303b99b3cbec58499223. 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/DEA892000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ae1d252c47277ebfa2867cc6078a3225b437fba20193f3a28b5de4dd31dc5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEA892000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad6108e3cf9629d615edef7cdaf97390c7e2da9d93588e563ec7785670d93d4. 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/DEA892000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b0508a4ad7a6f971808bc5e59053e2e53562bbb44722230765fe453bcbca7a. 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/DEA892000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab709bd2df6f7cdbe945fa1a462a88ff4a2c0cf2eeb79646f919866f6838664. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEA892000165.