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 0x03d77ec77e50713b3b4d451b821b24907d3768edf227ed8ac688b97ca0d489cd. 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/02156e57-14a4-4a39-8d53-07c23a81baab.json and https://artists.proofprofile.net/proofs/artist/02156e57-14a4-4a39-8d53-07c23a81baab.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 0x37de411dc26714b879a8395eceecd06b51852c19f4479cb5383d83be7f311139. 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/ES71G1850690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46bcbfab3d449e001f821a001500c090dc15e68228ab67cfe0951d9a8288a2e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES71G1850692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d9bfa977a81515f709731055b75a10d2861c978854446bff6cb57a4c333ae. 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/ES71G1850695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a87063d0d0b4e5a09b55e7594b80bd31d30fab6a5ef6e48f940289e7899b2d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1850698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a12c043118b26e604ad055dc76cb5f638f2504e59962dc864d220d46eaa2b0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ES71G1850702.
Ensayos del Camarada Lacrasoft y Algunos Cómplices Metafísicos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653db313dc793713e7b696cc15bf0268da0378b32fda31e2be174ddc52aafc41. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ES71G1837619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade0a90fb98b982568abdd56a1f7624da0a78ea4cf3cf44a94f1ba70a8e2258. 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/ES71G1837620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b0a800f5fbe8621b1522d4f60ddecaf2c97b528cef1903b9e23f8c6bf33bf4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:37Z), 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/ES71G1837624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e90d56b95e48191971b65f22d27fc46d01693528c64fa95b8993e40f5c9826. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G1838760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0303a744baf72be2da0e1546861e5e880f53ba09f64a448b178c695b5dd040e0. 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/ES71G1838756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c8796fd38ab787c66a01d5e213ee36dbb527ccc3def19e0b153fb5c1eaad8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G1838694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f4c36eeadbe2b8b841d1e4b1b12e137e6cbf3b567d0fa3615647b88bf415d. 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/ES71G1838696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20d0ee56760e34e8326bd749d4d93dcb8e176eb4b284a4af58aa3a8c8440dd1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES71G1838689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340c481bc3b92112c1e31892a807b270f372ef7e74e09b66806f8d71620b3d49. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES71G1838690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d88bfada9401af09fdbc4b695adc239e439b30137718e0c91fe87b8bcebcf6c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G1838701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eaf81bcf5f82e1aaedf995d994de2071901cf65357f9cbf6d001ff70455a6c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:51Z), 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/ES71G1916095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aa8a76866700356cb0ad88cf0208b013cd490757a2adb0968553402c4b41ab. 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/ES71G2015924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67700466acc6a24b173e1d794147036e5c39fd183fdc1e79cf2b8c13a1ea1c65. 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/ES71G2119728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde24e5aef8377dddeabf01e087bcc95f43a0403bbf4b21c9e38f95543beb7d5b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G2130680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa253deb56582913683e6e05356ee33d06f1260b3fec302a1903c7355528de085. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ES71G2144675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf826b9288073d1f0664496e3093bc42f80a04ca40b65dff03307716d129ee192. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:58Z), 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/ES71G2432673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fb06a9d2efe9a0bc48416d7ed21cda8b4966cd21c90c2383148b5455d8027c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:21Z), 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/ES71G2432675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa6f8782ae8ec6833f24b0d458a725fb604facf5f4f7e3c9e020ad83705edf. 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/ES71G2432674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b12aa883f434582f84b4f2e43b854a4e63014ae7454f408d171e03f345904. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ES71G2432676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27393014703f6385034ec3db6bc6f5240081b827fbb1c75002ab402c66e1c85. 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/ES71G2432677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c6dc9249cec75aec917075cf139072685f8e9cb80044f98565a898c71b9cce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G2432679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043b24f64b79fe6a75d00a8a79cbc6ef1a32c49420874667bd9e33e36d2beb1f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES71G2432681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3333b2037d03634467d6781d3fd3e89cd89c38c507e045e09f8604464d07a9f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES71G2432682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5aa1aaa825a2a90e8b7a67c7a9224cfb513b59cf68f4a71d94c5348d44d25e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES71G2432683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d76066709c174d88688a3105c31df53c48e4e77fca0c922c3bf897d713ad2. 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/QZ7R42455749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05d8c4b573846028391f0382245c9170bb6bc66ea91d46b129ba0cb934f309a. 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/TCABF1278754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f4ff2ae0e7a809e4210ea9dece1768a4383e71b2befda751f3cc620e37877. 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/TCADW1836345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d198b337b37d395ba46a9ce2ebbf14a1eb0bbcbffeef4628a9d6f6dcf05ee. 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/TCADN1870432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b305d18f2e0e7756ead406cd8422257977be26d1fabb65c08685827f7639314. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G1919058.
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