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 0x0edcda6bac48a24898ca6ffc2cbd8365c7277676e45242f2fb57b2b9461bde66. 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/a140159b-eca2-4e3a-a9c6-e4dd3b4a953f.json and https://artists.proofprofile.net/proofs/artist/a140159b-eca2-4e3a-a9c6-e4dd3b4a953f.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 0x4c822f44335a24648b1028f7c7511c38c8eccaccf39878ae656924d211dc1546. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ESA031703304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88adafab304ad58ae0a65a334270e5af31c3802e8b6ca3b5611300210df6650f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ESA031703307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9dc8aebd1b6cd8aff844340059b6aa94ce9a581b5396f74b591e8d000b6ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA031703310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb091aebbdfcb0e72a85a9aa53d74a0aa2da627e097ab690039963fca627c3. 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/ES80A2014004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e9ea0e1f060adc5d7264bb0bb99cf442f9fec8fde706af59640c2fb7e0b2c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:01Z), 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/ES80A2014005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788a1dfe2fc97d2ae77bdaec2513d12403402e343b2ab2df970742613a22c476. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:56Z), 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/ES80A2014006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c13e0a374a52878a2770ffe05172cd6920713538ca2aebee7a7ef3021af7a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES80A2014007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83f66a450cdee80dce574b79716b942edd833e9050376f1d128ebd4098b236d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES80A2014011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f5a3fa46f26a13b3c593e24a67645de16329ca8212a2de0e64509fd434590. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES80A2217501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d31141155b1c9f172293d80303752a56232e4b4e38ab2c1a5253957857c931. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES80A2217502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5280db629d424f5e23006a89f77e96a36f1a219e618033e0977a5289f4eb7b2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES80A2217504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391290baa4a553138df26c0dce3c0d3695e8ee9ce9dbb0dcdc9dbcd9c2df70e7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES80A2318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f1db31e976d48a58a33e62d6425115a03e8ee22a9e389bcb12df45c660ac6a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES80A2318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391290baa4a553138df26c0dce3c0d3695e8ee9ce9dbb0dcdc9dbcd9c2df70e7. 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/ES80A2318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762813384b9ca460f2f4758a0c14ebd9145ce44554b20514ac7a86fe3275db87. 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/ES80A2318903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f1db31e976d48a58a33e62d6425115a03e8ee22a9e389bcb12df45c660ac6a. 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/ES80A2318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234b8d97de89a0409a9477de332a62f378f6cbbb41cb331455b13a0b49177776. 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/ES80A2318904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5280db629d424f5e23006a89f77e96a36f1a219e618033e0977a5289f4eb7b2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES80A2217504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324952d99196ef9860d32f48b77579f6a4270dab1c5b6df2963d1fc0dba601e. 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/ES80A2318905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d31141155b1c9f172293d80303752a56232e4b4e38ab2c1a5253957857c931. 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/ES80A2217502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48323a19b06811417dc4d44d775a788688a651086de0e06aeba78223e5714327. 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/ES80A2318906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7cecec776de1a9a06149b62c232a31265a18678eb74c346c828c34f94a6c4f. 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/ES80A2318907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7f5a3fa46f26a13b3c593e24a67645de16329ca8212a2de0e64509fd434590. 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/ES80A2217501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb0c2f3113c282360993c7a6f0faabc33dadf980182edc576f199506cace42. 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/ES80A2318908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bb6ffca33312a16279b49858db9ab6f2bdeafc7277efd52373ed8fcb3cff2e. 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/ES80A2217503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484aaf052a20bb6d4033b43edd67f5184f5db72ddb8b4056be70f499df31675. 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/ES80A2318909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fec3cf3f1eb840cc0646fc9a82ae11bb67facda8835f39c810e6e4a39c7426d. 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/ES80A2318910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3b2d92a5fed82c357234c25113eb3484b6637428c8339c6057e3fabd60d21. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES80A2420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39077df76b2644e3e209eca0a890ba31474faca8508eceacf4cad3f2ec611bf. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:12Z), 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/ES80A2420404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafe1eb431518cdce39aafa88a598ef916c61e9b7f4db17032feaf5e7c29695d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES80A2522102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322ae66e32f940dd20d215c5b2d1459f39d455804d0a14df507f7e3c36aa4378. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES80A2522101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc161ea2a68385b3bb7f6d64c3871cec4060e0281c044a7efa2f696c8770a06f3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES80A2522104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdc2bbdcda0242a5697c1e491fd68f84e28e1983ebe74f8ec8bbf7766e267c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ES80A2522107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73eb12d0a2907ce8e2ec535c7b5af139be95fab7e79d7b95e2aea814944809. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES80A2522108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb45d33c0ce25b7b74a6f6cc78b468e5a1dff8d215c46ac3c173ffd765336900. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES80A2420401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3b2d92a5fed82c357234c25113eb3484b6637428c8339c6057e3fabd60d21. 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/ES80A2420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39077df76b2644e3e209eca0a890ba31474faca8508eceacf4cad3f2ec611bf. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES80A2420404.