thumb|upright=1.35|A loose bull is lassoed by a pickup rider during a rodeo in Salinas, California, July 2006 A lasso or lazo ( or ), also called reata or la reata in Mexico, and in the United States
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 0x1b5a17bc2358d53d4f828f010fa3695ced269e63d58288293bc502fc9286858c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4deaf61b-0629-45a7-9755-bf28581018d3.json and https://artists.proofprofile.net/proofs/artist/4deaf61b-0629-45a7-9755-bf28581018d3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08b23dd74da3056d85cb184ba34201e375501c3a948f58f587cff54468a4c91. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXUM72200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe4b02f986948cb78f4611059066cd986b6f5683665f97e0e7bd63b7dba7f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXUM72101349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834fa2ad5d5c5097ee516b0bef459c8ac93b0e01ddfc9685760bfb6a3f4b11c. 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/MXUM71801294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b47091d94507b46cb4a40d349b6363a1c3023efb1625dab6ed3fdcb140450d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXUM72201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab9f6e0e7401f0beee23195900e0ee3968f60158c12bdbcf0b1160c66cea4d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MXUM72008387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab9f6e0e7401f0beee23195900e0ee3968f60158c12bdbcf0b1160c66cea4d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXUM72008387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0ce1f98e32e20a7caa0108a4b9ad2761178c35620b56a430f2616cdb321c97. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXUM72401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299fd2aa8fc4e0d886590ce0d00f7b32c3b3172a64eb3cbf243ccb58a997bacf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MXUM72401779.
No Es Sólo Un Juego - The Official Concacaf Gold Cup 2023[TM] Theme
No Es Sólo Un Juego (The Official Concacaf Gold Cup 2023[TM] Theme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39a1350b21d57e446a3567b7d4dfe11f42310a533fe4e4c98b4af1a783c547. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM72308986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf65facd151072acbae50b9f8286d2adc4344f2791cb97508ba83d6514fa4c2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5152400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf65facd151072acbae50b9f8286d2adc4344f2791cb97508ba83d6514fa4c2. 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/ES5152400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538a7ca5cf8a0e0df472fc4ac2c17143a63efd49da8872cd2c3609cb5cca6dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLAA22400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538a7ca5cf8a0e0df472fc4ac2c17143a63efd49da8872cd2c3609cb5cca6dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CLAA22400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538a7ca5cf8a0e0df472fc4ac2c17143a63efd49da8872cd2c3609cb5cca6dc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CLAA22400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7538a7ca5cf8a0e0df472fc4ac2c17143a63efd49da8872cd2c3609cb5cca6dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLAA22400374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e50e14ff30a5874b254c879bd238b9e3711dcc429db3ec9711e9a740cb575f6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MXUM71901163.
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