Santiago de Cali (), or Cali, is the capital of the Valle del Cauca department, and the most populous city in southwest Colombia, with an estimated 2,280,522 residents in 2023. The city spans with o
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 0x7e4d5c448d5f4f6faa07bf4c56f8a6060d0ec6b5e90a5291f802d26609cec921. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39f5dcf3-2b30-4517-a012-3652cb805d6f.json and https://artists.proofprofile.net/proofs/artist/39f5dcf3-2b30-4517-a012-3652cb805d6f.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 0xef16cccb238a6ed60113542a0205eafcd13867d242e8fbca6e9adb87593c5c6d. 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/CH7812241356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85a279cc43e1d1982a06a45070b7189ecf2c7f1dc85da3cc2d53ae8beb63839. 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/CH7812410685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f99c147897bf4d24f4573b34d83ece03f3340591e82f6010181358f86ae9af. 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/CH7812410683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0608c74f67da202892807f3ee96df581bc8129a5d28c004676c5325f92a711. 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/CH7812410744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b96754dbae1176bfe897c6c7486c865d53f4a57aa6c97b272dc47c571d4c462. 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/CH7812410742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd09195122ee37d10aecf26444c4ddc86e8a462bfbf63f634d6604d79cbbc5. 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/CH7812410743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83108d79cc81d0850c404d05049b910df4dfdbc88a0e8872fa4ec8bcffa74fee. 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/CH7812530957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09cbbbf8b580b9efab13d552538d03532052c041e735f6b39b46f0d78f1be19. 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/CH7812424333.
Icon 5 - Welcome to Malaga (8 Bars Challenge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330db2bd5da86e5bad115cffb28c4adcfa42735534b95d48dafcac7ec32f1633. 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/CH7812365438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f1f8bc2505ab6acd14077d9b205f8e472bcb344fc5b991178bab35adc45388. 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/CH7812351064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e9b7e6485e50c3bbb4ccb7bbe9d9970c442723aa18721827a60e3bb3001f19. 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/QMDA62165165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4b971f8a7227d0565ecc7d1fb9d0dccd921aeb18e8cacd00cabbc72c643a88. 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/CH7812368271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7c9f8dbefc1c8198d55c345ea060fca03a78e332f4be704421089dddac2db. 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/CH7812365796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d281da6ea70f04247bdcf2b6f8f3272daea517c39d912e582070a61a127ba0d. 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/CH7812363152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25f6b6ccc0fa7ad044e2c886c090eb42b88d4d4329d405743a2dd75e5a33d3d. 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/CH7812418276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebe6b8f164f3337cc67f29d84e1e62d0b686b8b3de74169bd3985f700caf92. 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/CH7812425198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09cbbbf8b580b9efab13d552538d03532052c041e735f6b39b46f0d78f1be19. 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/CH7812424333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d4a7cd303f40971c06956883a6a81f4ba5251cc9bc0cff213cb12fb01451e. 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/CH7812421313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a19d63c1f38aa4f4d2412304e0876b7485764ea8075603db7c790400390a7d5. 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/CH7812423025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865d4a7cd303f40971c06956883a6a81f4ba5251cc9bc0cff213cb12fb01451e. 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/CH7812421313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb489fa8ac25b0cad078ca0694e969c9c9365d8eb9653eb39a85e32d4fae3b. 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/CH7812529110.
Team Cali VS. Team Hassuna (Part 2 von 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6647fb0d72ec1e167b86f9e5ec9bbc6b31162b44035712a6d5293840c686e7. 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/CH7812423490.