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 0x1d9ed0c5293df3b91c4a73ca615b0411f4419e81178bdcfa81cf3ba6dbd0fcf8. 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/6979c1f0-b84d-4227-a73d-756d4bfb93fb.json and https://artists.proofprofile.net/proofs/artist/6979c1f0-b84d-4227-a73d-756d4bfb93fb.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 0x1da5337be247df31267f138663b6a463021c7a5665cd472578c72e81d2481977. 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/USUM72015123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610229d7aef372571e74966c8e8507e942976baa30aa43a092bbed7bec701dd. 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/USUM72107313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e91433781f74767032ea412618ed9be59ec0f51eb7e70f56b9b102639ffdc4d. 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/USUM72307978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a0d17acdf5f51929b8e44eba756a2216f3ab1493558528efe76baacd50eb9. 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/USUM71921722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5a2b2bec9d8d1c6722a3ba6cf27baa61cc2dc7e27392dcb4dce70fd517213. 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/USUM71921721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1999e1d617e5d00d1b6b3b19026702f8fdbcca8910aece43d4bdfdc2c33f307. 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/USUM71921723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6050af2228003466cc94808d9b7e3ee6327a0759a966c7db3e96caf91ce6733. 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/USUM71911145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0d9fc79a8355dbe8231177ff32ceae7ae5194eab5fea3feb3fbd17433377c. 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/USUM71913059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd979e4aef1cfd7f8edc586c012dad29b78b37cf80bed56a6e745522f7fa7db1d. 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/USUM71920215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b7e1f0ec77d96cd3165f83e975c03f18ad1630f10b0220c0946f0c840d18b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUM71923639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f67b6240a940aad47c3a682a9f189363df341d3e163161e53cce62c6cf7e9f. 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/USUM72316685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517ffc194cb9986669085ed243353e616a30f86ec0632255df9b93771bb874c2. 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/USUM72310617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e694f0877b0243f3111443d38f98e00749e412ffd581eedefbd129dddaa811. 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/USUM72305917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf673a473198e56a8d7915dd884480242909672587fe63240c95f9823af3055a8. 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/USUM72300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92167089ac870319a3dfcd57ff13b3b63b66c8b6e6daabce9d886600577cd536. 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/USUM72210842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21601bb609043271e6bc08d6df5b475e7b9fa60cb8d79cc18ab2878b5c1da560. 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/USUM72204330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a088a51372d3e18471e4e9dd37f3f7dc7634238f14fba54fb2769b9ab47660. 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/USUM72201934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80f6d9764d78bacb9744dcd44e9b8447368cddb7db82dbe2055258852c939b. 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/USUM72120261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae51477127a086947baecf782792bd3e28f9448ebc837dc5a810c57bdc3399e2. 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/USUM72115100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2357eb35a1208456738057344ad45659f44138caa3fce762c103281c52cf1964. 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/USUM72110825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae67419381cd00c01f55f5fa7d598ef2239200a98b180795fd79531b24d2b0a. 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/USUM72105237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6945f75066ccc8b5f896368021d417f470a2465415e7f2e30fb3877d5a33186. 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/USUM72101499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa637604b4cef8743a34cb757a2c21ed30f28717b31c5b263212892f4959ff4fd. 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/USUM72021537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827f0fa2049f96107f2391f3ae5814da5e975e27f772db90aa1f54f797de6b1. 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/USUM72021891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f30b54c60d3ada9b65a3dbe4849c384046c60601d319998fa029d9fece1303a. 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/USUM72017948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8200ff7870ffef42fd963fe83a822d74c9ab11035b90aee258ecbd36fa4c1a2a. 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/USUM72012016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ac768b3964f384a747b565c2b03c638b79c44d62fb1b3360f3b900642ec1e5. 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/SE6I32048673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec990de68d9f208419b6a73978f458e8fb17a326dac98259a36c3ff110a1f2ed. 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/USUM72010888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af6309403c53416bf581a6b839ee0e1ad3750508f92bb2e9936dea41b903535. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:11:09Z), 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/USUM72008304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b7e1f0ec77d96cd3165f83e975c03f18ad1630f10b0220c0946f0c840d18b. 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/USUM71923639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd979e4aef1cfd7f8edc586c012dad29b78b37cf80bed56a6e745522f7fa7db1d. 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/USUM71920215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0d9fc79a8355dbe8231177ff32ceae7ae5194eab5fea3feb3fbd17433377c. 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/USUM71913059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1b9ad7c7d5ad494fec9ff2b43c39a9f061bccc812b3e50c66061c7c8256d48. 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/ES94B1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfba84e86b6b4efc7b5b101e4602e0ed286486bda52e679f4cc1f376e85e957. 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/ES5022101617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193d98be13a337f2bb75acd8a4b8a7be5d8a726bd9c3ecb0fb7f55065f94797b. 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/USUM71917973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f313400b6ce21a214d7dcfb1867e92707bf9a4c05e170ed94b102cee10ee93f. 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/MXUM72007188.