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 0x7f4712b7c806e9135a1c186414fafa33e22a163c87fa1af17f2fb77f9c2297c1. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05ebf99a-df15-4f03-84bb-55f573a41037.json and https://artists.proofprofile.net/proofs/artist/05ebf99a-df15-4f03-84bb-55f573a41037.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 0x72a47180d705d8e8bf7ee9c73d702b4bfa83e8d46c22b1192df865dffd1e91fc. 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/QMFMG1459838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d0cb4f026096e2d638e6dbc054c764d01ec724d06020c63c6c6fbf983153a. 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/QMFMG1459844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca49ea7144c1535914076263ecac16511002f195aeda8161635a830bf13aaa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMG1459847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5badbd3ec70c392b1b0ae0abf6818fae27091da9d56a54fb81110f300f7eec6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMFMG1459848.
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 0xff108ee3a7c9ade27487dbfea425cab9496068f46923d6031d84b4e27ab9e1f2. 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/QMFMG1459850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7f201b303f9b4de2586654f6ed90fdd33505b7491af7069a9c71ad19766b59. 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/DEBL61232446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3096dd02e31e9e7c7c7640fd2c970b8701ab6231ca0ed574ddf9a260424109. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEBL61232456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b0bffe45f6a23a24170a235c3371307bbdbfe24a04aa25c6f61900bbe10c32. 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/DEBL61467594.
The Roots of Tango - Jewels Of The 40's, Vol. 6
The Roots of Tango - Jewels Of The 40's, Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d6e25c3547e297849aa0d69ba20ef9e528ffafc5361b0062dd3b49f7ccdba. 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/DEBL61465593.
The Roots Of Tango - Jewels Of The 40's, Vol. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae610bd511af2f73d78f0db6d74dcc583820fe2b1b16ae93712ea2a9625c87b. 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/DEXO42491123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39f5b7e527824550a69e05e964b89d45de03e06b1c70a8c9a052ed86accb5ea. 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/DEXO42491124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9fc5fd3aef1f72cc00f577a63eaa652d348999514f6ae7ad0ce14a308555e. 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/DEXO42491125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bbce9a8fac367dedf2fae1d66cb680b41b53168e8937dc159221683f996b80. 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/DEXO42491126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cce8f6d9631e1c4c3e10dd962890497390cc3bfacab4d093b3fe29da301ab0. 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/DEXO42491127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108aef17d94e7d2c7fa07f324e17e6252281f28761a752af103dc186b0444f96. 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/DEXO42491128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e06eb323c9e51251ef15dec246eb4e2728417dd7ac76328f2d32c51c6474106. 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/DEXO42491131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d707c4d51a40055ff1b052a243b379c9eab5109b1251df49f141c43139183fa. 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/DEXO42491134.
Junto a Tu Corazón - Versión Alternativa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce022ef9430f82bb003cd6832ed30eefdfbbe1f2ca2e3df32988b5cc2eae595f. 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/DEXO42491143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c5f0f7b800bfdcb69acbed8439452af869abfedee1d6f9d471071bdd7744c6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEXO42491129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb14f3854da8c2854dd542c3d62d6b7199836e23cfbb3febbf134fab8907bb5b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA371276445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bc7a44dcd28fc7818e1a9d727d85bf6e3d0797a1f118e6c3ecf31372bcdeb. 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/QM6MZ1702782.
The Roots of Tango - Jewels Of The 40's, Vol. 7
The Roots of Tango - Jewels Of The 40's , Vol. 10
The Roots of Tango - Jewels Of The 40's, Vol.8
The Roots of Tango - Jewels Of The 40's, Vol. 5
The Roots of Tango - Jewels Of The 40's, Vol. 9
The Roots of Tango - Jewels Of The 40's, Vol.4