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 0xcc2c36599630240e043ad631a99ce02d007e0c9451f7dd2a42fbe0d3aa8a00e7. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5c0ae41-a28f-4863-9f0b-7600bde35525.json and https://artists.proofprofile.net/proofs/artist/c5c0ae41-a28f-4863-9f0b-7600bde35525.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Baile del Siglo Con Fruko y Luis Felipe González
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 0x2822646e0c79193ec6eeb932308481e33bb13efce9f50a4f21e777c0a6dd4470. 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/GBEUE1300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf480fe31f51d32cd5b1229f18e9b9888729220511783a33e3c330c6187b81543. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2010269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced9f138fdecf73c36e281dd0cb06a3671e8ec1e4212707b24ea362d58135775. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/ES71G2010270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6454f9d50e43921735cdda6b3bef38e903682858266222914eab30e0b3ef80bf. 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/ES71G2010271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e7af87dba08040cbde459cbd3150a4f2b848629d612f2147684b7333dde741. 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/ES71G2010272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fad491c9ef47ad17d1230f5de579b9b290cfa2a3d47c454ff6374e1db95ff5c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES71G2010273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8827eae67c0f7f6eaa3644d9132cb66d474b85c328de849ec127c5f4e849157. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G2010274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66770f99bd4c1c16b23607f809f8e64071cb4d826cd536d7df5b96798ff74656. 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/ES71G2010275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6cf483614d3854727a93a7a95fdb1a11d38fbefda5ed231994ec2f747ef7b. 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/ES71G2010276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aa9d046834ac53b641617ffa62c90a1c046e833fdfbb2989a059af5530dda0. 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/ES71G2010277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756663dccc80b2a3611de0f44c244d551430549f637f6b171d7700141ceaaa5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G2010278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f7a232526e1fcc6b3ede50698a1069de0217a37f7c080418930cd3d605d249. 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/ES71G2010279.
30 Salsas Pegaditas Lo Nuevo y Lo Mejor 2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33afba926ee0b2116fc1c7fbda7b0cced334facfdf76bcfdddff233341bbf521. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USALH1102762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cf87afe3a9474d14bbac73d59bfc25e840586066a635301834518b7224fb0f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW1721846.