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 0x832fdb540bf4c6d15dc6f0c1c7a9d885f96ce55bfc32a3f55776c0fa113fec2c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c471fab6-2dbd-4cc5-a5b5-42a80eaf61b6.json and https://artists.proofprofile.net/proofs/artist/c471fab6-2dbd-4cc5-a5b5-42a80eaf61b6.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 0xbda382546738582478ae06b02f95997113c0e2a1a6974a7a8c6e702dd0072fa3. 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/UYB262400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99aa3d2c76e1f5745c33b4d4529395dc771a5312cb82d5fc26320e02b01dcc0. 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/UYB262400068.
Suite del Ballet "La Tregua" (Fin de La Tregua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af89a2771e762ae624120c07fc3f55552aef660f4ea5627c3d01975f9ecbdd4. 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/UYB262400069.
Suite del Ballet "La Tregua" (La rutina de La Ciudad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b6a19d64944e09706e63f5a7c0e1c7afbffc119140561c09371770ff8be614. 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/UYB262400070.
Suite del Ballet "La Tregua" (La redención de Martín)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f809deae10e5abf8069feaafc873b0585f6c0519c8d15e28897d63a2600f894. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/UYB262400071.
Suite del Ballet "La Tregua" (Otro día en Uruguay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de84ab403df6e516985e620ef73755e7f0d95ea8e39f985d4176f42192e8d9b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/UYB262400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe359e264670cc12da50a2e24d5108efc705b0170757e609ee75dc0a2466bd679. 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/UYB262400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef37b6bcfaa0733c62efe35287468cdec3b985075b21671311f3c0f7f6ff2a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/UYB262400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f25412ff004d9b7177d35d34f8c5e69ad356fca00616ae87515c238e40a6c. 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/UYB262400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d1c24670f3ee8da0213e6664e02de0a936e1d089ab95a96568f24aec8dd690. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/UYB262400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac68d216b6a024796320238b139686d5418a7575be1cdc32fdc91e98187e9ef. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/UYAZ12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bcf5d8d095e7d5b675d4dad929e7e686e16bf98aab48d62a537865e13da2f0. 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/UYAZ12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c22a88dc8f04341ced3f4c5ee3bcc74306ee3692c8529db18ef1a9c0e82170. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UYAZ12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357c2ed6f5943705082c40d3b4e2ca9c9a312be7ef4a4c8a2e79cd907acde147. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UYAZ12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b7a5211859bc57a75de86f140eb22a9c6e30c085d929156b0b807691c4cf3b. 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/UYAZ12300005.
Coplas al Compadre Juan Miguel (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0239207e900cc3010c27a43d973b05b2536423c5ea86a8d67e43d76e619a5a0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UYAZ12300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77725d52bda2ff4ce46b09b587e80005fbfff15195ff88bd18da9fb3b95dc26. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/UYAZ12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c14836bbb92601ec1b49d4581c1653d98fb1ab806b40b7e44c41f16d924b51f. 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/UYAZ12300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab2103af84bcc5c9d526d868ba18def7ebed55a51e785087b4cda5037738ad. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UYAZ12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d5eac47f13f37c302fa62295ee25d4c5e8c5a9beed2ec7358916d9bf4317c. 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/UYAZ12300010.