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 0x6c1df7a6bd075184ca691b8ef905a187fa8db47f8ccfdcb542fddcfde40439d9. 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/d3608d72-d578-4b88-9c34-38dda368a341.json and https://artists.proofprofile.net/proofs/artist/d3608d72-d578-4b88-9c34-38dda368a341.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 0x1ed978e224b9fdd94e1c92229d6131bd1489e9edd69721194b48d55c9ee7c306. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRJPA2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755c1ea1629163f89ed72d6dc6a37843a8ff05add44603dc33f9622a1a9cd33e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRJPA2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf93629da24e396b341fa2f8db249ebab9ea8caea4acf604cd824326d674cda. 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/BRJPA2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4831a93cf742285d614aae2902ee18108ced52c42b13b69f98ef4341d2291e4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRJPA2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea8b32379a5cf3b49f59d68c5bb36b78d1f20cbf2850cbdeeb7e6d8129b06e5. 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/BRJPA2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7383731a73e8691505c27e3277ea1eb26c7cd909e256f27cfc42c5b698e9daf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRJPA2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2cd94ad58c988c9d63be2ebbfec90618ff265a775a59ec3dce334b70e12c1. 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/BRJPA2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e4e69980853bea2c832feb6b065566752a334b542557a0555b1bcd529573f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRJPA2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a31425fe6faa77b76e97fe85128cff1984a69b0bc94e928af8124c0df69d8c8. 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/BRJPA2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94e18595712de31ead799aa05407de6d564f82534ec88b8ef13f3181976dd8b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BRJPA2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8aa3916bca0082be8f31c310cf4369c585ee1ae0fd0f095c606c43740f439. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USL4Q2324492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f7c2eae0d2480bdd3b9c35a060ec96e92e2aba333fd958d014a76408b509fb. 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/BRAPI9900617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1dd2b883d533994e3d9a0a4bba97c925dbedc34fc4505001500c4d9bfbbcce. 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/BRAPI9900621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4278f893a6fe6526aa459d2d5918918481bdd10693a11b6dbfca39f98ebad6. 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/BRAPI9900616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b540a7279411534b5a47810ed082554c56def6984f8e28f815de055b5262c11. 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/BRAPI9900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68399d724e25aeba26bf5533cdac5eb1605eb5d419f9f42ac7875d58fa28c7dd. 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/BRAPI9900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a469bed260b40c1ee91730b49eb1a5ec2f87799f2d3e67512fe0cc671f64bf. 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/BRAPI9900618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ad45fc7c2943d406ce23b47ba44e34b0a35193ac94a7beb7a94d0e13a2f098. 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/BRAPI9900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad13ca3d47056f124873a664dacc4006d1eda3e229ed30a5e2a1ea752f69c685. 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/BRAPI9900615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bb5fe42fa6ddc05701315290f9f267a4170b0374aa51152a740de80cdea53e. 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/BRAPI9900614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9bd5360330162b8964c16cd74e3d0a3eb663efeb51bf8a349a85c9210a154e. 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/BRAPI9900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6ecbcf102ed1c9040a87a0715b9b45754c566f2d600b63a4737674ef9e4f2. 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/BRAPI9900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512be09cee96e9de1b29d3a3fee49400266b793f0e55b3b1c7c3947db54a2de1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRAPI9900619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a562fe8e26ac0688fbc9de874700280ab382115fbbc74f78e5bf0e29d9981e. 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/BRAPI0301674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca9e3fef0008a7cd5c55eb0454e65118444fe42e03ebf4a81656a6082d28cef. 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/BRAPI0301675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16f73a506696830a6a5054b6ac97aeafd54f259954f615173feef2a774ee43. 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/BRAPI0301676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4a695fac5c51dda12df607834cd4de547a2d221fe541b143327501dc8c4d9b. 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/BRAPI0301677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0585a026666ed7eedd0a89a10af471e1d6aa0e81aa76600d7a6b5e4efbfcc27c. 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/BRAPI0301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bfa852f26803e0be6326cbab9b2b12791362d76d366d652139033ce003502. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRAPI0301679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6e7c3ec812fc099d3a362188ffc98383379986fd5d159e43f33f95c513180. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRAPI0301680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d5728318615fa83e57d9442c3b23f5899d53061583003326ed6f28e1294168. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRAPI0301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196088c82804661c05c991a13485b2829ce76484b45042f02794772cae04c96. 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/BRAPI0301682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5749ebd784e852ce62154ea1891744532b9892dcd09ac6e8528ca3864fe1de. 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/BRAPI0301683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b05c27cbb25b96f899a25f912005b1942476c0d4c6a9389604d43e4dc04ccf. 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/BRAPI0301684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c8c7fe90dfbce787038d6494a3224cc59fbb710efd481980208c76869022e2. 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/BRAPI0301685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21990c5627446f6555132e678490151eb5326ecabdfafbd8ddc49975084a84dc. 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/BRAPI0301686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e45421e930c3a3837dc7eda86695b46edde624c398020d88b5f11c991caba7. 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/BRAPI0301687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47390efda44bfaca1587f684771009c8ada02b57c3d7aef01d7aa2d974d54a33. 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/QZNJY2499453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4905f857407c2ebfdf08e3ecc8b414d68d79d604a0509f659d4b9e826d02a8. 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/BXW4U1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5312487aa82c3d9658bcfedb4ff2922daf52fa5ee2e8abf35e13182e2d6e0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BXW4U1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf236a01f5e26ba74ad69990c24ae190a3f2401fa69c7bbb31d6885f4635bd5ec. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BRX2R2200025.