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 0xb1518f3d87005bd3119f05795f471342de0b6de76f36dfa9d67b6ea7e8c643c4. 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/72c62f11-3fbb-4688-a88a-9cad40ceca4d.json and https://artists.proofprofile.net/proofs/artist/72c62f11-3fbb-4688-a88a-9cad40ceca4d.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 0x547d558c25d0c9594b790c790d6153a78e2aa0580fbd05642fe7f81934693f90. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES5080700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84601be1154983ba3a80f47b869684c008f5a3369ef3c8e218fd68d901d3af2e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES5089800659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f840abc62b44bb451c6d2969812f7fc3836f25bd3c77ec42736331ef663aa8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5089800764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455bc74b760d0d0a28c023ae458e02ffea124dffe5ae1fc5afedb9f54e270d98. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:55Z), 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/ES5089800767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e34b00ca2190dc242c49f27f06419f77e2d89b1ac5c1db7c4ef442bc3f2a6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES5089900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400d3ac482190dbca122c582000206fa49616a86517a13d61afd1515d839c81c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ES5080208028.
Pa' Los Pesares - Con La Colaboración de Manzanita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc050a0f4f63149b7ca8e465ec415f56e93d7e076e60e4a5da1b55063a4452a33. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:01:07Z), 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/ES5110404851.
7 Reflexiones sobre la nostalgia, 4 Poemas de amor y 1 cancion de Lujo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faba7090226a441fb6fe39696549f1ed132c6a1c6a2209a01627596f3651be1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5080700521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d35c537eea76196cb8f8b18cb0a3e50ec998a0d66cbdb0fbdd0f9bb5de7e40. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5080007702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c8cfad265a71f60247ab296d4397977a53fa3fb17ca41421eab7a872a0ff9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5089800770.
7 Reflexiones Sobre la Nostalgia, 4 Poemas de Amor y 1 Cancion de Lujo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19975238180a0e8322ccabf09894c8268169d33999dd8364abb06d6b3222031. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:19Z), 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/ES7580600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c8cfad265a71f60247ab296d4397977a53fa3fb17ca41421eab7a872a0ff9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ES5089800770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0887446aeb4b46c14b1c796fab0f230810cb0d34193678b7b9c4e56eac01bc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ES5080007692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3443f3d4a935663652af9d97e6a49b6be45c2dc2c413a90d433afef952f8318c. 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/ES5120400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826c32ebddb5a4bd39a9256294de14d5332ef0ae25285d52219fd2bc49ef1bb7. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES5110404850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eebebe58096aac27cb092dccfc44e7b8b0d97ef6e48189fc8990bb988e89b91. 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/ES5089700083.