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 0xae53415f5a84777366331e08804d81d3226a4c995692d8a87fb4b4e739159ee0. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5289bb09-0eb2-4919-b308-18b44085a997.json and https://artists.proofprofile.net/proofs/artist/5289bb09-0eb2-4919-b308-18b44085a997.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Altres Cançons de Nadal 4. Un Nadal Amb Nens
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 0x34b0ddceac2a478c9c75777f7a9a0baefd47fe85609f1a1e094f24c057a59f82. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES5950702456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997e3264b40e6b84c2fc5fb5dad0f422e6e84edb8acd086dc387e94fa289c735. 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/ES5950702455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4b967ce62ef20a556410785200b6e7da234bb1983524d5058444542f363d9. 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/ES5950702466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dadb017a54d310ad141d6bedac612dac4c8d6f1716eb4a650e81d4ab04145b. 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/ESA011206991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c160a65fa17a73b6bae5af96b33396e325f146768f5e0042587113753c24d95. 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/ES5950501819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40da57185b7985db987c6120f4c5e4c75daada336fb7dbf3759c03bb49e0b6. 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/ES5951605452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf912edd345d9ae2281429c89903fd0b72e2226e51a0a556b769c373adc756e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES5951605456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1213d8b9a7b0d1c1d32d6fe620fb0c4ee53ac23578f71f3ba58ad15b81074d2. 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/ES5951605457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4f0f362c8b12e326d294ebc78a772ed1b57cf1b9b331f2af3778ac0636bf7f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:18Z), 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/ES5951605462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedba2587709b5a97ac0d91abbe27e82b27eaf91af7101b0e4888a12615149456. 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/ES5060625929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97988491f085b44d8928c6f946dbd1b9cfec1ee61d1a3f1c669b1dd9c7069a86. 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/ES5950601840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8265b98f515360bcfb3f946e8ef00d294256844a5f9d8712835d1f08fb8ab. 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/ES5950200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783e13df925c058938d3f2e9636a660bb1c626199ba6e0a563dbf02993b5e413. 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/ES5950200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32464e4377170855c6ef53f312878e5909ba8124e75da2b490d100d17e958e. 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/ES5950601844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf655078ca43044f6a542eca2162dc9f16d89f604d7917c04f2abef6c2cbcc0bb. 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/ES5950601846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf36ab126b06d7140615435bef05a2c28fee48263252b82cbf31ff3c626a7a5f. 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/ES5950601849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce224b72365f872b165bdcf3d64609d050c93e47da38d3143dd2edbb59d2128. 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/ES5950601850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69732aedb34a49858076dc6e3b74745856e575f6b9332aca7fbce328a3cf1930. 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/ES5950601852.
Serrat Encanta: Per al Meu Amic... Serrat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd516d8159486d5944f379049d1c001b817db5a6b22b14da2fe5f29dd719734. 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/ES80A2320003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8263562a286174d86d58cbb5e812f82f7bdb65ab2df293819a4c78e4422777. 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/ES80A1505901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37266b719523aee1f1f4e392696bd9ad3838ec548c2c247cb80b94f6c5137a0e. 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/ES80A1102405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379c56a15c8aa5a5751348437b3b8ca43de6cfd99ffbff844e0551cb00ebdd31. 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/ES80A1102408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44243e9d95ba6e0a78f17f90d223bedb2724ebef30fc4e9d570d5e9f8c58e140. 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/ES80A1102413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a93ef85d2111db95f95e008bc2d4ea6349aaecbaa3e6c9b3527d44063a91f94. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES5950501827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f5240ca7e4c36db705c2eab0de39bf28701b1d4bdf6b24c1b88f02d8dd8ac7. 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/ES5950401524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a3dabeff1cca881cbdbaff942aecaddac7210aa0d09e90563ec5374eff4d8. 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/ES5300612951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf355ed3cebd88df1ae52027563faa2c152e8cdbc7875d05588aa819a0181f8a8. 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/ES5300612982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215295b607e14790e9581b4fe0f65c43435d74281d81e197e3194572819b9d8f. 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/ES5300612956.
L'home de la Guitarra. Tribut a Josep Bastons
Per a Els Més Menuts / Això Era i No Era...