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 0x0b0b6e9d96f1dc7138b499b1361d25e9dc0baba35858ff9e3482880bf77aa667. 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/9d10af0a-6c17-4913-92a2-efba373ddd06.json and https://artists.proofprofile.net/proofs/artist/9d10af0a-6c17-4913-92a2-efba373ddd06.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 0xbdb9a32e594e5c24538294c584b832dd0eb23ee195ef2d3a4a5fff83945afbbc. 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/AR8TN1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d128273b79b5e7736238e6688d461aaa6acf18a28d340cc18e3dbae3260cd2. 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/AR8TN1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914ba72e85e6f96a88dfa047f4c5beb7fe670b400e709e7c3840b7e5dab7a963. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AR8TN1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ada08c749929d92b1b7cff27a91b57f371a1dab7457309be9b6cb15318d4f86. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AR8TN1600025.
Para Todas las Mamitas - Le Freack Selector Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc89956871f31a6dbc249e9b6ff3782bfd73dfcadce75a3e3a71d1dd990ae0f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AR8TN1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453f542729ab695d804ad4b6608222e3ac52edf0d8474e598c2fc84e7f59792e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/AR8TN1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77013ad995ed9932bfb043db0043075fc9d5be3ddfeb153a743e567abacc976. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AR8TN1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827307136198fbc0ebc923cfdca4f39352d73ab70731aaa2791b480b86e55d5e. 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/AR8TN1600029.
La Fiesta Se Avecina 2 - Diego Cano Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c04787d3e8ec7b85621b6b5122fb1976e57521949ea10a42252eeac52e50c8. 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/AR8TN1600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619f9f5affbfd9cfe2d6482732fe8fb43d230773bad48c2730ece4ea375c6659. 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/AR8TN1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e10835eeacf0657a23771481ce9ac458c1e6739ba4d9dfd0065418c072bd5e6. 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/AR8TN1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d59fed8a1bc1526ba00ac03dd88cf5fcfa7993c8eb87c91d5ca8954082e20. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/AR8TN1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e92719be4b39b9f3a801e207c902930f250843fb463cbf6d1354d8c0ee23b3. 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/AR8TN1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad7e374538671f4eded534690b069470195f659656921f2b83d059c624f1edf. 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/AR8TN1600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857d67f934d3c6fde873f63f395339975e3ce126c94d36ce1bbc4ef1dc66899. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/AR8TN1600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4297629ea39ce8433210d11d1c9e84e036e9c257a738a3a80ea0f7a21792c94. 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/AR8TN2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2597afe134fd177cc8650fd48399933409399ae67a6ea3df89b7b771bc87534. 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/AR8TN2100510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a3a373b74edab40b5d1548e01e4473bacc650948d47c1b2f611bb01a9494f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AR8TN2100184.