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 0x2befb746769714967cc5bd84b34612e1624a41f103333ecc0cd796e658e532d2. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/389288b3-3135-4a8c-86d7-ca17d235abef.json and https://artists.proofprofile.net/proofs/artist/389288b3-3135-4a8c-86d7-ca17d235abef.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 0x34659698f47221e907a95b32242081ca2d3bc63dd8493d6e79e1bfc0ecf2f4b8. 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/US7VG1995421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6809279cb50f90a6f71b53585f4e36961918d1413d877bcc7f381766f138284. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG1995423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778bb9e3a900c6c8b4d9447f6ac357d68a26f98fd07ac84bef226ca4e3aa546a. 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/US7VG1995425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a98ae4d9d68556d1c4fa645f730a61b1a5a6b4a7029f90fcce88fa851077637. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US7VG1995420.
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
L.A.S. (Dedicado a Luis Alberto Spinetta) - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02437ba85808bc6d44ca12deb14e2817850d781e25084d0c631a65b3ab9dbccc. 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/US7VG1995422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9768550f43d66f7d28230b6129951345ae250214a5dc78923e5d110643fcdbb1. 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/US7VG1995424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ddff7c13cf58a9ced627893531dd90b974eaa57decd7de1cde3e6ac7071963. 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/US7VG1995426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba82ba36b0205b53743006b10f88f210e3d320c3df301ec20dfb8abd5877206e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/SEYOK1771158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac579e2136d4406944e32d6169dad3ae529a2cff5e60bfbe0ee84f480fedbdf. 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/AR8NN2000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc5de6fc27ac38ce0fa1a9dd85e5fd617dbc415c0118ae3f92346b4443510fe. 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/AR8NN2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ca99817e897b6ae2f111abbc7abc6a5c0f79209db10db00d1c596bf6dd8f16. 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/AR8NN2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cb79c4d038cc2f56d49e427743598125e3a46ffaa92946fc6546e9ade0b4b5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHZ62233521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614906a27fc93e579ba32a43fa48d53a1d6ed90d286b34388e7fa4a2b4668392. 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/UYFL32100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497c006d6ce9e2a88fe0a7bd4764a511e8dd8e116b5331301eff73bca2fbefef. 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/UYFL32100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4021b782c02dde7b616374280ae577a3943b1e732e66b1b64740e2484fd7aa. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UYFL32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7934c58f3cea8f54f0877e96830aab4d5410e7a20749f56b06c70798eab690. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UYFL32100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35747ed701cce3f5c57928647cdab86a16b3b782a8ccb0eca5b145300f711a7f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/UYFL32100005.