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 0xb804185f20895ff3b8b49a8d4434bbdc093e914d5a2fec8d4104ae2fc1e8da97. 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/9c821645-88d9-418e-8fda-a18064e67a9a.json and https://artists.proofprofile.net/proofs/artist/9c821645-88d9-418e-8fda-a18064e67a9a.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 0x859112a38ffe2ec844d5e723a1466bf69c399fe76d900d6510aac6b51298f3bd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA012288172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524f3c14a3f6951c1c1487ec967499a9cad9d0d8d79068c0d8663d3b56cd5bf8. 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/USA2P2335457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebbfab6533a8d28cde63b12bd5db41b4fd6a4a9298516fcbf9b0f39705e1b4f. 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/ESA011581572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827292cac124830ddab3d0d51f7d960e8b847e382cb2282b15f4ed6e76fd5e55. 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/ESA012045148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ef43efc812ae45897dcc7249981f2924153a357f3a8173960749d8774030ee. 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/ESA012045149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4875b2720a2788fb05b86870100a479c605fa75f376989890513f7b8310f60. 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/ESA012045150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504814f35a449dac29badf5d5eeabc56ffceacfe9b919efee5250076e4efc48. 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/ESA012045151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2bb22ed870194da8cc4de3e41d184a4cd57c3110cab4da8139dbbacc8653f. 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/QZZ662372569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7300cbdd3b31a55c0161b00ba608c604ba1211cd6ecd9347c99f586377007e4f. 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/QZZ662372570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4ca74b86d88a2ecfe75dd75794cbacd67b5e76a88e59cfb9eda1c5240eaab2. 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/QZZ662372571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00650b6a7f10ea88e2f1e495d15f4dea5ef278dce0fc5e76e3bbfd5bab22ebab. 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/QZZ662372572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10454d53826c38961417e0aa1a500d1509be9bb1f26c8cf3507c15ba1af89c. 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/QZZ662372574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782fe7c0c9609fc523eaf120c647c0fe73bc61ae4666150e38ea8ca45d5d5a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ662372575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cddd0c6c4d07d1b4cdeb25766b8f3b6d2dc155d55668e6175af61091fc08dc9. 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/QZZ662372576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6cd83e9bcc35dfdda99bc9e2e2e64e05c16e6568398675d4aa9ab24e43e603. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ662372577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3107b0a66d882f52509b3a070786ed8437c0166438952eacb814a10cbcc3471. 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/BK4DA2500919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33d5bc0bf60a59c9b7447ff15eb6833cb66a31a7bc186c3a8a3c46e16d3af69. 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/QM4TW2580693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12945d47c15ec570177bd7b6c4db5d33be873ce730a57c20f1ad74daadaaa39. 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/MXF152402063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b878d4909073c9d7a2a3d6304206f86c1e77bb917aebd6fe8619cbf406b0696. 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/QZFZ22350487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d6079ee9b1719600b733d42f3f3272a56fbf8684a663d482f361420186e7af. 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/QZ5AB2434368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec9500e77140e41912471ae5f74f7b6f04b58c629e9e3bcc0e266a520512c07. 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/QZZ662369949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e90f761356bdb30e0f57cd108b7041d025f4e3ac1165f475d74b12943df407. 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/QZZ662370017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0443b59a6db4e633b08e3c21a720cd462035aec7b8a4f55bbaa94fe6e8bd622. 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/QZZ662369131.
Buenos Aires (Obvio) [La Ruta Del Perreo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e12b7224c828e6b10e7da2ca04a78394f252b4bfda4b6f3c605d4626a654c. 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/QZW9M2306439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f56c7891fc1cc644996cb67f0432151884e0ee7f5ab80f30343f6e8ac19c7f5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:40Z), 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/ES75E2306378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a0c90a6e0085f282480a60a4c09440b6bd9b4b481680ce4f77439001ec8ff5. 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/COAKK2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707582bca3a1e57900949c7e3eb202e5a6b811a3e958898d339f104899cb22cc. 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/QZNJY2243737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09de203709edaa5d8e05b70aabb8511780af0c1828156eb0df361cf9b5d292f. 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/FRX452276251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644597ddef6930b5890c4a433e67d5f938d4a2292df160ce354593418840efbe. 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/QMFMF2394698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a12097291bbb31f59c649c36353f1eeec8666e54c39a220ae18421988c2488a. 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/USWL12000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8bbf8d37baf87e4a498d85ad0f0768029b95d0d531c8af67661e2662144f2c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:26:44Z), 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/COC011933369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8920e86fd77689dd690d41d18bf7bb1e59bb5157e3e7415947dbebdd1afe41a. 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/USLZJ1502202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de23b39531bdbfa235da0d5cd88071ee0ee19c15b60fe21b07b60e6fbd075f3. 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/QZNJX2304189.