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 0x9b09b3610ee74b238ca17551d3a44e67fc51228941b1e26a4717454cda976f16. 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/7eec36c0-30d2-4b58-8be4-53a1018fabb4.json and https://artists.proofprofile.net/proofs/artist/7eec36c0-30d2-4b58-8be4-53a1018fabb4.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 0x173d67d54d4c7b15bff41fb8ad546f99a9d8e35b8dbcb0391bbc4846d0ff372f. 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/DKMM12100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bb20cb4b55cb3ac818e6e7921d0beb8cf8ff77731bf90ed73612a184a085b3. 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/DKMM12100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47ea80d3c9e3cc0887f716ac3e5b72779d9c0d5db449ed47456ae766778c7c5. 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/DKMM12100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d0164dc16139ed854e90795b12c0dd6e2de4b06058ecd94742a1a934fd967. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKMM12100611.
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 0xe32ae4a72dfc2cafed18cd7c3d94ffe08307b614c2da7b036c0e6cd1a4ea4fd8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKMM12100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa863bae0195a6c33a9694b40c56baf8ac94f08c415514afb91fe543395feb019. 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/DKMM12100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6d19a07e45f64574d9590bf774385d290394a498ca67d30d59bf52dc57837a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKMM12100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf755afbe75de47a8fa2591b852ade04a087c7c85c8f6c51423316197dcb54ce. 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/DKMM12200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc3a820d00db20e5fb0f195681951ca3081eae9c086c85cfe3f1aa0115edee8. 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/DKMM12201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cfd8da60a30f3d26fa99380fd5882d39dad89830aa69358744df4f606e381. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKMM12200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2e3e6561ecc5b24c5dd5ee1b8015423c4eaa05707398e3a9f29b314a183a1. 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/DKMM12200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb124a5608eab6b66ed71cad73334f6bcc130f7b2042966c407171172c5b6d02. 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/NLZ542200036.
Thinking About You - Xoro & Jack Kelly Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83844e1811fdce9e939b97d37b23b4666b2469548928afe2e4f9c364f765f4. 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/NLZ542200037.
Thinking About You - Oliver Nelson Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e11bdde163ace75967217c56440bfd873d9a0e83703981daae63ff1a51f77. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLZ542200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a05065860fd9e3e71b1e320f8abe05da77527cf337ac841309c22598379fe. 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/NLZ542101962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f19553cddec986530eb6180415f624b017a0b54b2e2cc851c017e3a66b7418e. 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/DKMM12100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b6fb6d77997c55dc7f28f98c46e43b49e0cbe1d97712c499fb1a1dfcea29e6. 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/DKMM12100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8f1f6ae66870fa8739345990a786ae0983d3cf787dea79128f6d4a2beb7c2. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DKMM12100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5243226ec9b4e89068362df1b167a781a2691f76f9001e19544355f37a59011. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DKMM12100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b167cdc79682a1470a8e641d2493e9d3a8e502241837c137b0415e33076c783. 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/DKMM12100412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723781c43b5effc11574c8c78534d5d2bcc661bf210459d27b8050e34e521979. 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/DKMM12100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6cb14d4f3d43d00ee5a3ab23b4b5a0760673a7580c6fd400286808d6bfbfc4. 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/DKMM12100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b1cfa181d96cde1b73a2cda3a3bf4d66762c9ed311b257c05ac05e77c8ec1. 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/DKMM12100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7afd62fb9d42b1dbcd29eba7aefb21257c56b07007352db57c22fd9ffc1fe63. 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/AUWA02100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c6ac7c436e6032931803f29621e1299c76bb066cb86c1ef78b0dae475a3fd. 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/AUWA02000458.