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 0xab87ce6222d5803ae4ba8792ab5a45e73490274578b4ed69e265c276f67c1f21. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5b8ecf9-ab72-4a0b-ae56-f72f044255ce.json and https://artists.proofprofile.net/proofs/artist/f5b8ecf9-ab72-4a0b-ae56-f72f044255ce.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 0x74d1e6d9f18af07121e241c1c98d6b82d2738d190ddf8751b942447f0e04667c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2390821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851b0975a2f69f40afe9b64776027f136bbc29172567651abd19ed505dd81fc8. 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/GBKQU2372017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d6048e54596e9461337fa900eaa1660cb2321af3f97553ea38a4a33be25e6c. 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/FXQ892300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2987b79612540311d85412b6b7ee66ac2c27dd174a1eb5980fecdb2e28f0ba1. 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/NLT2H2300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73387c618ea6da12abcb35900d18d6e6abba86d296e700723d078cebd1f6c9be. 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/NLT2H2300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef08378cb015674acac13769826f56db76bd1bfb6830ea1004200f09f602a351. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBEWA2300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce9c191f6c8ab629c75863f8b611ed4637127549b7f3766e81d75f7cf16e85f. 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/CA5KR2299266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b5541a30a5fb5fc504fdd7bd3b5742bd3fa4bd7c548e8825de01930d174f8. 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/GBEWA2207060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6c808db56c28c0b9e6c417da7b683a986ba58e5b4d6896e6bb8fdde12a070. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBEWA2206610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccfb6c80b60ff4c4d04fb689e7cbe1c14c82325493fc10ceaa9c576e90c9c69. 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/QZQAY2200952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efbd15f7245a621023b810bdc1edf4eca90414b14f3d386489ccacfe141ff60. 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/QZQAY2258090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f5dcd9f0724b4eaf5670a5b9bd916608d4eb564a928a8881f81be57fa9c27. 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/GBWUL2109662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b285295d1e781ccf92129d3a3c0894a6e9ad04d44298696a948cc47e5fdf241. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBRKQ2179938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667023550fa0ee5abe4db987cc45fea1445e425f434f350623d5f1591d4d7f3c. 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/FRX452103728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c5bd01a8491d667cfdc8a832a67d3af39de793a4817b6e8edd32dbf7fe389d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBRKQ2137301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71efbf4c23756a4859001450b95d8d45f7e4214926a8aa03d836c177e1c711f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAN112000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a3d0194099354053e9ef5e4544af34708e95606755af548c0e4867c7814447. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK6KW2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4eda6949cd9082fd8c9cf05ab549f165ad67a105cf3a8d009db15a75dd3e6f. 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/GBCFB2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da809c6330c93b36128cb65e6416ed6fd11ac4a492e21eaf14ba1eae58dd9d2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBCFB2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ff8ef369d1f86f622e7cf79a0fc2402617fdc0475cb7dc4b6560295c206c20. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAN112000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e87a905eb2094c262779135e8add455788b4f3465e7f630c708ff4f085b7fa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAN112000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00002354f5f73a41dab3aa7d973ff862b0cfdb27dd98cc63aa7e827abb42b88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:01:25Z), 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/QZFYY2016853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eda6ab901a9cefbd151802b31e06a005053d1b0a6b64797e28760d328f9bec. 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/CAN111900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd705c20add0cb42665f705c2f5861daa37ee9bdf7055378bd6dc4ec67ff578. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAN111900343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6161c51d5236143d6309a69bbc633c2d3dc5875108941f39195cad23aa33c9d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAN111900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e424e9518731801af9477a67fdee7fe9a7a1a06012f1fa5751cb9a2965c295. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAN111900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39995832e9894dde9e418a261574398028c829cc3e1ab9ccc9f075a90a72e1af. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZB4J1830208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c7e91922a47b6e2e1c36254a7ea30d4090c6dc7b001cb89b3cd4d50d0e55d. 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/QZ9Y21760654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b224fbc69c6c572f9f33bc3bd34348097dee4430381518e48809e4972e7bff7. 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/QZ4JJ1779439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16826b03b696e3424b87b1ca170c3b4753db63d1713a445ab1f430a507a5a12. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBEWA2203740.