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 0xd61e685afdae3bbffb7e0f7a4a950194101928a1673d99d7bf920a5423a4eea5. 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/5851005f-f5a9-4cff-8404-89080efe54fa.json and https://artists.proofprofile.net/proofs/artist/5851005f-f5a9-4cff-8404-89080efe54fa.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 0x3c641b86c930f6080b15368170402825d0cf6eeca6e7b123c99abdf49d986a96. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN71965940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a5256ef48f29572aac780225aa074fc6453ba74832b047a02c8f843b2aee60. 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/QZHN71965941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf394e4b74f3a2122441be789bd14663a3f0f41a4ddd2ba382c2308986c4a0bf6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN71965944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daf7e1a5d3ac9f3c7cbe525b6d9fef60566d4111a9b62dd4bb6fd0c330dee92. 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/QZHN71965945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c7e349f5168e02094a29c7cd497206c169ac2e66bedfe4b43502e27df768ad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN71965946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e225e6eae7eacc391ee459a5783ff041479316e0b32a7326806b24764b56d1. 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/QZHN71965948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243f9e369a689146dc94ed76ea499e0ab10de35405c4d67600e6b46111ac92e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN71965949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec91e9f09c9675b00ba5f28bf08acbda718faf3059c4c19a2b1c0722b13980c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN71965950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c03a28ff9a0e495859ff1f2129e5f15b021fbfd6b137b7024ca0db1ede9483. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN71965951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02638bd62ceb7ab79aafe2efafee4f9002a015cbbe8a7fd664d2cd34bb90f5ec. 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/QZHN71965953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4dc32e2476862d4310f3aab0ff0629215434ca7515b7410b8f86ce0c5ed019. 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/QZHN71965955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad7179e5cc89a4980401b912c0d7756a34094dbc3e22abdeb727db04d554a3. 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/QZFZ32049102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b847036262303c10ce1fa2e22b96df308b8842dc0e9e3cb2bcce9d4e45b95d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6H2126453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb5e6d79ae167d883758f56b92998da652827863637ff3b84c29b2ca26acbe8. 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/QZTAS2173345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3d9015606b352b118a8eab1c22d1055fac5407265f09f9d1d4a82f70ee2c5. 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/QM24S2201769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c76b2377dd207eb79a78f843997954990c5ab201a3c22f5af3b9b10d67744b. 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/QM24S2202362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3d9015606b352b118a8eab1c22d1055fac5407265f09f9d1d4a82f70ee2c5. 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/QM24S2201769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f012ff7603a1a22f5b604250366eaa3b8e34312915ff1cb54ff87ac49a3593. 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/QM24S2202361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b847036262303c10ce1fa2e22b96df308b8842dc0e9e3cb2bcce9d4e45b95d. 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/QZK6H2126453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf315d4bf88d74ae806873b91a7249b2805cfa54dce874fc1b0e00a3c41dcc76e. 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/QM24S2202360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b882914c0819993c991a7fcb40e57c56f5961f4e021eeaa07b496973119d95. 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/QM24S2202359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fca881c2888c7cf73e12dd6337c5a41d36198c84eb32cf7b01acb7ffa44138. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2202358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2bf75e988372b87f2b9974a9da573fe7b289b60506d7affe26d5663b6c83b5. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZES72127469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c8c81dfb6fcfb615fc7e9e2b91e3a15c1dd499fb04c676b524de096f1e5b46. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QM24S2301048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0b0aabb287b1d350199f5e8c6d431f849a0e5298f8abb3e3064cb852d7206. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QM24S2403544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0b0aabb287b1d350199f5e8c6d431f849a0e5298f8abb3e3064cb852d7206. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM24S2403544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583f078c3ecd8db2e8a62251b28ad9a2dc045f34a07f0cbd45cea4eda47d669. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM24S2404689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdc14442d01d350109a0d3fc94314404f61c86348c6c8701fed6948a6d2f791. 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/QZNWY2223653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dd5a5291aad2733b258f5e92f3bcfe0a23aa199bccc7465b8a825dd40fbcc6. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZTB42221441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa838571e0d739ce28e5283e5fbb65e78a33527330edefc3294c254a87d071a44. 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/QM24S2205450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa838571e0d739ce28e5283e5fbb65e78a33527330edefc3294c254a87d071a44. 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/QM24S2205450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e74049b8ef9df8d140e110078c866af1ccf40a7877afe03ff766e2dc8551ef. 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/QZES62229446.