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 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 0xbff1886b11661dd67a65120b20c9ea35d3c6db8d3eec7c67512281541cba1eb4. 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/1d0cea4e-39a7-49d6-8e9a-ab949ac5c51f.json and https://artists.proofprofile.net/proofs/artist/1d0cea4e-39a7-49d6-8e9a-ab949ac5c51f.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 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 0xedb8d4971cf02e078cb8424ca470c77a3f78d24ccc65e3f5d9f6b5706a862358. 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/GBGLW1600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda509beff28cf7a60db3afdf0d67d429bd10dde9b907620a24f29a59d69589f3. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QMEU31510374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80eaa651ed0f0e9d4eabc1149cfc4ac5fd8928e4ecb477c0db0fd81a1432c7. 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/QMEU31510377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816ef9b8dce3c2bf4e6d1e5e8da6e4f2ab1339631494e4908385f413bced359. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMEU31510380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1494b8e0d4dafb304818dcc4d7aa86a075325f4aebf68d7455083cb59f9187. 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/QMEU31510381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4827c8731ceb67382d21f71584ac79a207fdb907ca15de4de0f9c263205065. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QMEU31510382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2c7aa1831f325fddfdd946ca004e02822787ce8750c91634ffd668122aa189. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GBGLW1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e182b1d06f88a593ff2eab067f576052a6147fb6e4d8d29eec8b0b199f7cc2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBGLW1700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a734838353c0c9e69d6b5fc95274070e377468cedf96ee3ae6e85ed870f0aed. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBGLW1700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73c1e24077fa12ede29fc856ce9ec6aad76eebd87cf3fc961baf343d90ce92. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBGLW1900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ade932850cfb442580347c0c96430c78b3877bc89e2500f81c23cf57ba1b6. 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/GBGLW1900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6fa17e9ca851f183db8cc701ce919162ed9c81a91ee641d164184a2ce331dd. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBGLW1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42403362da6d464647b8f2443b68861e21486414679765dc83511ec0617ed51a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBGLW1900158.
Último Aliento feat. Gustavo Santaolalla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02d6f68795485bc3c47d373ca28fe641b5475e214ada0e1fe9152657260b31. 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/GBGLW1900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a31f5b910047ffe068685ec6988ec10f575ecafbb2f8ebf1d1f841345880bb4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBGLW1900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778f3adb90317a91573fb4b987ba25c59819681fbc39e6055d35faea615662f. 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/USCCW1610778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983f98198cc67d39da04d4043283b9d686bbb9c8cf2bb29ce60512a06197e4e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES5022401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81b25de42e1d002eb728fbf98b137fae45c1b6709526b0ce1858edeb6d0923. 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/BRTRB1909406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778f3adb90317a91573fb4b987ba25c59819681fbc39e6055d35faea615662f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCCW1610778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1492e6e396da02f5a9b1af65234e26b2b55d11446c102b67173e01501fdd53db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCCW1610885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778f3adb90317a91573fb4b987ba25c59819681fbc39e6055d35faea615662f. 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/USCCW1610778.