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 0x51779fe644821565df2a243d338d0d98803fe4866cf065813b0de9bef3afb370. 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/802391da-5c24-4722-951a-bf9ffaf5421e.json and https://artists.proofprofile.net/proofs/artist/802391da-5c24-4722-951a-bf9ffaf5421e.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 0x3d722a7bee64e12e4e0c50f12b25a4940f40081925b89b0d795bba56da75a9f1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4TX1828202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0a6690af4800a93f9841e482ca12a9e14877781b86ab6c2eebaddd7f8005a6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:24Z), 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/QM4TX1828203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee4b18919e031714be48819f79207d88ef195399bca85c8ee71a5f418f3684. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX1828204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5eb7174b042d09dcc0cbccea18d3fead4c7f9959dfe7170a5e7fddf002278. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:55Z), 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/QM4TX1828205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c1a79347843f4ed52a268981f65c4a41638bed71ed84989d9c9a359e2b9dd1. 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/QM4TX1828206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514e62da2d992a305e2eb35a35badda503b714a9795c77049c522f7ce788a443. 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/QM4TX1828207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea00a9e0cd5254d598d054acba179af88d8faa8c8e7092285d389cf0c436d1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:17Z), 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/QM4TX1828208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbd145b689fbb1417e1a2a20aacc43b59ef91229e4536a240ff6af32d460c5e. 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/QM4TX1828209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53753e3e320e05b4173aa56791ab8ec2a9f4b8466b2ac55467f54b6982c6abd8. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM4TX1828210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7d872ad37796b1358e5f1ea47bbabd6b90a68a1a947f4975a38764b8c836b6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TX1828211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918f9fd57ec25d61222b82bba81fdc103f3ff5e902fa0243bca5ef33eb5878e6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM4TW1843250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2147add8505ce5a4ececf09e3b58b41024158b5a74e50bec4a7f610dd999c5. 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/QM4TW1843252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aca01609da0b21a37669b8f7749a578984198ec52dcfa222c09a1bcc0041d3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QM4TW1843254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ff636979598bfe96f211327284b28b65cce708025aace9b56bc726a81e3dc5. 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/QM4TW1843256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692db2faaa39a0885803b67e636806ef5cae9877591c08c0303b131ad72231f4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARG601012276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc894437e8cb33a2b47730be6b7c92f944c5ce84a703ddedf6c58ee964ca7b71f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARG601012279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c96d42079f3bd9a8e256b29c7464ae49e61d497dfba74b0ae9c1f1bc936191. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARG601012282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bad50807b6b1e213dd509637a38b25478f5b50b5af538353e13316153070e5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:21Z), 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/ARG601012285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469aa06f12dfd53caa62669d3ac746f36f1d83d608585f132cca2fb1a8b70d5. 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/ARG601012286.
Macabras Rarezas (Retrospectiva 2004/1987)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f57d19f594d7e1ef12212b205008b76390b9bbeb978403348147538d40c3ae. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21431196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d3e2ccf9559217e256a3f0bd263ed4daec20d7284c22c67aab441fc2895ac8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:40Z), 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/ARG601012290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980ede55c856abaead51a0f66248bcbfc5474f8d139ff6606024eb7fe5af27d. 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/ARG601012291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde5af0d3a8e4aabef93817fafe54ce61bbd0cf48214a4aa517d7bfdb72e7af9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ARG601012293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd883cd879641d641b3fdae6e7191e1d936fce9824d95ae85873f1418c0013. 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/ARG601012294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2bc3813233107f613c9a9f02c0e89c05cde30359e54edd9e4eca4e49d0b5df. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ARG601012295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0588b0cfecb0b75d5173f30fbe27ce5dd3439fb0c4e1db35ed95e748b32c6655. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARG601012297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b98c0d756ec387f89d79f59460b2b56788e11b68033d4a4079f04893fa660. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ARG601012299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e023b26638390aefa60299ef163b0c5ba6311764c8e41fc51d6d7e00f590df. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ARG601012300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff9dcee0a32b06b35738cf7ae36b1689a7a3ad275db67dcd13c896ea56b2140. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARG601012301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a274b9dda66ab83242787fbf8da3456a8a8de8f5432eae3ec63377f52b1cb0e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ARG601012302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4fcec4a039c3ed06a26e7add1b29bca9bd8aaa02f1c5327358f5604e9ca456. 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/QM7281424369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58b7c50552dcc6b831a257f64071c078b58316976886ef83a9c0bfc3d590bdc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ARY4P1800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e7c163f416f546dae94f1e8d6945688dcae50ae8883445c95e05b28747c24. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARY4P1800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9879bb36cc9fbcc5b926ae5b75b3ceb56f172c4844750ae500d65faf790724b6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:38:56Z), 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/ARY4P1800376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694296862b0064936c6db78b72a5d536457d79e81865725fe5e0f09536e16e63. 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/ARY4P1800377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2753529b9cc368660d57579f5f3e813a3cefc0879579bf7251a6d6dbdec55e2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:02:49Z), 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/ARY4P1800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6451e4fc3ef8af6e5e4814d693581e13a70646005ae11e6e458666f15cc57a30. 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/ARY4P1800381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8361ec2936b5e134d5a1ca41394290d4b1eb0caba4a5e7c73886e24185cb03. 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/ES71G1922224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71337c349bf142da6f57868c95eb5b62e66e940f7538f788802a6e572eb262. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:31Z), 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/ES71G1931183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3b27bf3b3557616cb5cdd7f1563363592f4e8efb0f74d019ef62c77986746. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ARHXW2001796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ec402359cb989015e323185a382453fe758ae0c4caa73385e0b9467e7c436. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARHXW2402525.