Habana Abierta is a Cuban band. They are part of a generation of composers, musicians, sculptors, authors, and actors that emerged in the early '90s with its own identity in Havana, even though some 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c821cb2982f1f2f2a5c41ef273fa22d0e2370f0625e03f7afcf253431dc1e6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3255a39-3283-4a4c-9dc9-7b23b9732c38.json and https://artists.proofprofile.net/proofs/artist/e3255a39-3283-4a4c-9dc9-7b23b9732c38.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 0x733de3917117d3c33c0b381053052bf9c6cb9e57d646e92fff417d2aadae8f60. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:33Z), 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/ES7750500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb252d1fa017c66f906ffa60b8073d338c251361a2683c4f49dbdcd75672bf6e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:18:43Z), 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/ES7750500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45ef6643d143ef36a87ca558e083a8cd653abbb470bbdf4fd6306fd032f101. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES7750500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd734d7bcb1b7d85bb5fd23119ddc847ef9d2f71d32d68d2f06e3c9638605a288. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES7750500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7f2b924b3a5d477e9fa82d575d2aed29802b20616f6e4b6c49563a6228709. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ES7750500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f97ad4de064a10ce22437b7fdb631dcd3f4fb76a3e9cd31d33a750f6755bab0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES7750500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c724791b3d525e925dcf65277aa797cfab8292e4768668dcf5fe28d19822af. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:07:24Z), 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/ESA021000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336fb5eeb93b1b863614d78fd55122ba189015e5dc63e08de1087bcc28b5a61b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:05:33Z), 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/ESA021000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5874f9c0873831c1920c8eaa9c0dded1189a27294bdaca6c2b030df6fc6a362b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ESA021000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd534b9063922402064a79766ce69227684139c90cd135a72ba30ad323b76280. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN72231428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32a65de6e7a720772fda479cd0683d6e73c27d0a654dfe1dc6a908e1a645066. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ7361802110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d90df7208d8eb1ef1abff86be8cd28fa42a78828d2acc5bf7b69a7fbd1e1d2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZ7361802111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a6f758635672d5d1bf9ea6ee628b8a3a3bc2a250912305383853a2b8f830a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZ7361802112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6799efd32674a3d2677d9af11259b2d0ed8935f7cc6d586883b38abfb8598e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZ7361802120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f6d3d7bfb5f6e2d1ff558b4154584a797a7e0825a092a81569c31b2ff2b62e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZ7361802123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8a295bc7513fd48291e3635019a17f35b224c27cbd9153574d44f5d81a178. 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/ES7730205449.