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 0xa36a587143f1789ba39ff6d8958776ed08932131bafc8ac27d49de2a6bee591b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/464a46e1-bf04-4a65-8a79-e5e85b3b37ec.json and https://artists.proofprofile.net/proofs/artist/464a46e1-bf04-4a65-8a79-e5e85b3b37ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Barcelona '92 (Canción Original de la Obra Teatral Barcelona ´92)
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 0x6092c98518cb9ae17968d9ae5d7cc909269b88a506898707d6870b86ae7ee005. 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/ESA081850526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ce6472f31c4da1b81c0fa20767597582d6b98d3ac4f5eef9410b88292f41c. 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/ESA081850529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216e6447d79f0733e5818b55beb0d0c447ee2ea6f848491c4280508ed28dbab5. 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/ESA081850530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ff02faada63097f2e8db7eb4aaaa0981686868dd2fbadc1afcd23cff28e1d9. 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/ESA081850531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07288503d6333ef284dafe47671e45d31c4b695527420aec36d258b6c9078326. 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/ESA081850532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419ea8a4632b5755f576dd9240605d020b9bd276555cff7b462ff3aa7872c293. 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/ESA081850533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75d8700ad3284e4b0217e6d6666e6a4e488a420e2b2e830710d1985d89ce3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA081850534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885d964478e9b8535cceaf95fad929bbc35d95e18fdcb2bc79366c66e4b0a184. 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/ES64E2201311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1583248cf114388d039d40aaed3086dcb80a67a8445491def121e5c54f65624e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:18Z), 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/ESA081850528.
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 0xa3bfed0df53f267f87d680dca8d45948f59d079f734aab0c37827c07bf5c7891. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ES7771517057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe498f5642b9036022fdbf0b0c004b84a0540a9aaa1f06649ea3573763828b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES7771517054.
A Los "Pescailla" (Bulerías) [feat. Juan Debel, Tino Van Der Sman & Yelsy Heredia]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb03e213508e29a73920cf1c34b149f256005d399dbf38eee3293f2f6e8db9. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ESA031601605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0494890c68b89aede9e82ec5ae668abebf8544570d3abd5d8890940bca00529d. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/ESA081850527.