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 0xe69fb37b99cde0b1863f2961f34510bac0932fc71c7fb792abd05761cdf1ea8e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51482452-af9e-4422-9ff3-fc5be9b878f6.json and https://artists.proofprofile.net/proofs/artist/51482452-af9e-4422-9ff3-fc5be9b878f6.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 0x221255d85bfe5d6a47405ab9aea52baa465c67ccfe691a08fdf34166758b6326. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US7VG1726377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8213acb8951ab63c47c9700b9e5226ef4d86dae06464bedb7891fe45fa5d4067. 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/US7VG1726379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5216b60e8cd192aff4300d0b640e68f90e778c9647ea9cf73f3bdb3f53544ea5. 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/US7VG1726383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a3e83da3ad126ff5784cc57dac42261a6392f60b235f66194bb3fcc339feb4. 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/US7VG1596928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8d9285a3f8bd96e1fc393dbba8c83de9d33b091836479718fb1c529389645f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXNT62205434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347201a36135a70ac1566d09357ac0856080d32c06907d447c0194b092905269. 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/BXNT62205454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa6718df48819b04cddded3ab555567719c69f4611100b47c2c027d22782617. 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/BXNT62205448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb8f325f3c52856d78878a46e9bb8ba300d218f580d22f4cb4debc2e5291262. 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/BXNT62204222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e88692241f92c16159954ed5ca032ce27b67b0e14db8ddae8fa7ebe9296d583. 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/BR7PR1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a11e03e2a606c61fb036758467fb9f54b7d71f128c724a5eb6e203a4cddde6. 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/BR7PR1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc29df2f4329847b6d950021c029b2e3b8be1eaacc6c5145a157a1952fd498. 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/BR7PR1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f14d91bf9ec3e824c3a8f04420178c1755bd7e75c9198f2d662c76d011e7ce2. 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/BR7PR1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b23702c68bf9b91f150ef1daf2e56968aca912115c7b8ead524d3661141da. 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/BR7PR1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8f7e65b18e0fa887f99f801034f7007dbaa4434b92f9808fa6ce871152f270. 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/BR7PR1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83af1335f377e563516b2bfa5da8a0de2e682c041216f19903817a78dbdee762. 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/BR7PR1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b05af01a28cfc56332530ec51222f9970bc0eb8b34e2f136bc6461adb6a568. 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/BR7PR1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c24bb1b8515f76ad2650451d061981dde24a123f82ad873fc5e532d4442abe. 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/BR7PR1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcfe4fc6e819f2c5bc4ceac9f44415386b846640430028b8e21123249ec0934. 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/BR7PR1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43189a5da2ec60905fd5ab91e309d3e9924f31f7ad240ce480be34d1b8dbbb39. 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/BR7PR1000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb560d0f5796e97b24535e2b3891ae965d59716c0ddb2bb923d967758ffaf06f2. 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/BR7PR1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb090e627789a5ab1f1e11739f51d3bd47dca6230045a99f989e981a0daefa. 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/BR7PR1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00add8e3ed20d2191b4743f987e88730dc69d02b89d46c7fd0106d565b93cf1. 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/BR7PR1000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00644254469aeca3abaeb028ca2658fa1b3cf2408a4549842347c462c8e4ba83. 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/BXNT62300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e27b3e25da91f6dc50aa06090dc6d6094211402c5ec7fe27db85b4e0a53dc75. 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/BXNT62204195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6902fd052bab8d308bd72bf2fe3316d8a5e90f07d8c5f1189791535996e38035. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXNT62204225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7945a708094e1c56b4b07f18c8f5e103dd9af5e3274b1ad98934327c3499fe2a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXNT62204201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d84785cd41e7932cc2b1b4ca2ecfb43b4b3a85dd6a8cfc113aa42a53fa96bd1. 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/BXNT62203646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8709b823f4592bb35862d42ed947617e3b977bbd187534b2234917f202645f. 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/BXNT62203286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514233c81d39009fa5e083e9d20a9182fc2fc01a0c7987aec687b668809b8808. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXNT62204204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156a8bc65583c3be129e74dfb14ae1a7f2bb2a039fac1423885da4dfbd9582c7. 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/BXNT62204216.
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