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 0xbad49946e771a20e8acb8e11ceea3dde8d0bd51be839e20d1c1a3e4d575e0739. 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/b7e9c09e-b31a-4d42-ae1d-71e85b6d4916.json and https://artists.proofprofile.net/proofs/artist/b7e9c09e-b31a-4d42-ae1d-71e85b6d4916.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 0x89acf5f56f76c644e736f2a013b5fb27f7b09f6fb550dfdb636c5d3a70b6eb96. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES71G1778747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9d44af6473e9d4ed1595292d4847b02f5b8d8e512228b2d2d8902dd553a9ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G1779748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73c6ebfbcb201bada4da9aaa2868a7c7cfdf1317498d267be0fcf56c1d4250a. 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/ES71G1778751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb90f39419c93cb457600ba2116610f61e25369ca15a63c9feec0bd0364b93. 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/ES71G1703939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0619a5479c070c72cd99d21d2fbdc29aba72c086be47070487632b10451d876. 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/ES71G1778754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27226fcde09ae0583fb69e85b31b12377986355eeeaa8a6ddbe0ddbe38b0dc6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ES71G1635039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1007af1025fa993b4c4060a83078a8544010e8137134cc9e40a0ce931f279aaa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDY41941480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ec2e9b7852d477f0bcd661e8d0d63aebb911f8ed1788019ee333e5be3254e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHZ51904685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5b1be2d4782e93cd810eb8d4bc086aa4d5e732e8abce317ef0937a247ee2b0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHZ41979944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6576a9d8fa2a4fd45be363eda0a20affe0fd90835bb431ed83f66459842ee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMZ92044690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52c6bae29e547af5450a9c14322f8316f16f19f72fb3e1909f4544a0c13bc37. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5702100900.
Canciones Completas Desde Una Casa Vacía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2901a6baa42441f7d6050e7a0cf80d6de3fdc211c712c87993d08699cbc840. 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/ES5702100904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16862b57ae17bb4efdf35424d41658275a873147ef5b8ab29393f7513e5f5b1c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5702100906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8d20427ac0826c64a24098b5ee7dcb41f69de3b3273707ab0024e81c986f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P2342262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dbaa524cd04ecddae17155336a9f1384b368ee0ffbc0974731474e1ec17541. 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/USA2P2350507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e89a7b8c8a0c8e57820c9e84883cce01050bcc328a210f9c15f94d8e858cae. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2355203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee487f4c731619a540ff64b88d61db130c5f59658ff8f13732771dc3b5bdc3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2355460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc788ba59a020e1dffe2fc47ed83dfc8ecc314e68abeef2a98d65f5beacab0c8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2355993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8ad86bf0166f2593ef0f01cb13964f96d781c98cbb0003d2c495f3e058e2e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA2P2360188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b44a85af3c2eecea19b307b039cfda884fe0cbffba7d7b283bdd175dc92b1b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2360191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d96b209b0fe9efda0bdd7252d3c17af4a22d4db7b3386c465e0fc592d53a1a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USA2P2510373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e474049ae435e6606d9a9cb8945b93663a42d242cf4ab2b47c078075fb8b26. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2510374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb8887825d312ada0a4d26f6dde7988504a4c9adc18826f052def0736436057. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/USA2P2510371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989a88184859ca2eeb97b66fbff6c0740751938205381f4fa3c5fa5e315f9b58. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USA2P2510379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876017112bded9340e1543166f03015deabb9462a8edb4d33b0d8a1c411e9ea8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2510380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1405d7dbc6d8487935b17c3ab8a3e19d7e695454eda6b5ebb19c10e1d84bd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USA2P2510377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eca315c56491495220d2de4c4046664d3be1973b01908185867722c0874505. 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/USA2P2510369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc607e05c43c3016d6f19ffa3a1031e8219a30cd542fa3ac5f1b45b653423c9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USA2P2510381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11309cfa6b405dd598854eac28cca24659f18c3acec4d60974a8275c495cc949. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2P2510376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388c102a01a24f41045f05fdc6ac20a39ed3fea8b5332cb24763b713ef1bb5f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USA2P2510375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe332cb4290b06ca6129e7fa16a9a01703f8e1a9aff0154a1672d0892d7d04a5c. 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/USA2P2510372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d86ef0d492931463f096a618f65ee8e8725d7840e615ec1ba39e4d8fdcb2dcf. 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/QM6P42588192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dcd1ab0fd4d4d7ffbf278b8b439c76a908ef6a2c47759c636ee2421d81a2fa. 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/QMBZ92474828.