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 0xc537617ec93d6155215ed1ba9e2aee950a1f01a6db14cfc5a3ddc4a3e1521b57. 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/a502db5f-3d78-4418-b42f-6a537194e00b.json and https://artists.proofprofile.net/proofs/artist/a502db5f-3d78-4418-b42f-6a537194e00b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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Introducing Oneself and Others in Spanish
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 0xfa519e187df0f13b606f4c8265d6659638ddfdd5413a59228d2d1e8c30854b7e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USCGJ1682205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b4f79130d270a5f7c147d198f2f43d247c4de5d8d849d3160ee316af600ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGJ1682228.
Aprender Inglés Fácil: Frases y Palabras Inglés
Presentándose a Uno Mismo y Presentando a Otros
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1000c0341b6831f64a1395c2c85937beac0366d83c9d4665a39de51078fc94. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USDY41622469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d412ff33f0222d066df8459662cb1cbd5f28b3085119be07265b6e23188c32. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDY41622470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f88bd6ec9de183a3e341b4ee72511755067d81e145d6e9b1323f5ed7d8608b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USDY41622473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d396d48a4f01c1b44a4474e592821b08b25a12057dbe0d59e4935866fb369e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USDY41622474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6543df253b18e57dd7a2f14bacf8cb46b1d2eb18c482a3d4dafc77d33a2e08c0. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USDY41622478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205dd1f2d4af9f91ecbb04ecf6996a4010b5f75a1a26718d7c40e9c2ce933c14. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY41622480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbc9222971598c584449778591bfb81ecded0b09e70c57f4c11ee520c67239. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDY41622481.
Conducción y Alquiler de Autos en Inglés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40acce2c30542e560d0bee3f0dbbaa526d229e61aeefd235b235fef0f9011e6e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USDY41622483.
Días, Meses, Estaciones y Días Festivos en Inglés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b9eb87c1d9e4f8022fd71501153d5e6d859bca6ca5cdaa46e1487938df3d9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/USDY41622489.
Tiempo en Inglés (Unidades, Hora del Día, Preguntar y Decir la Hora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f5617d4d8ed6868ba4f09d33184cb4e9e35e23ff0d5cda62e789c1fd26a333. 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/USDY41622490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135732425266c2d4adc036e14b5f34ad30cee066ac5cc2938dfeed0e74cd37de. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY41622491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1a98b88b9b38131a56e84a90ef552c0e75148285313972072695851810472. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USDY41622492.