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 0x261c3434a06329cf3c68721533f084cd64740fed13e8caeb92a5b718391c2731. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70a11f00-1d71-40c5-b6fa-b36d95060e91.json and https://artists.proofprofile.net/proofs/artist/70a11f00-1d71-40c5-b6fa-b36d95060e91.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 0x3b5b2d215357d2227aeeb111f12916fddf06f734f2127ea183aa6ecae164dc05. 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/BCM612100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd257980eafb58505245425a8aa70f08c9c5987aaa75d375c05047c7e390dfb8d. 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/BXHM82200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a515ee55d2440fac736b9f78063c79c9982ba46612feb06b0b7c3adddc6a9d. 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/BXHM82200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c908cef1079f84a49d2e7c7a1b6cdb7f89ec41e9ca82a908f1d9025040e9d6. 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/BXHM82200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada9df413646403b4eb8a12cb9d0075ecf2b8284340d60d0d2e5fa843b4d5b5c. 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/BXHM82200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff73f091a37d4957bef0b3304e2050431c758eae6042e666783ffc7149b47cf. 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/BXHM82200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb866e726026de2acc7e66bc459a4994728cc90fc79b91afd2a03a524a97dacfb. 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/BXHM82200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a090c7c48350a53221e30386980b1c1ff44a4d055c22a1893efddae28386fb1. 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/BXHM82200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2544e85612e075e2c40af4aa761aa9a50172a9853453f82123f19600193d60. 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/BR9OU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf992ea6a6de8458b316269c4a39420882b36d75e40c69dd82483c1e88f7a2fdf. 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/BR9OU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade1b849b2d56644fca623e6fc3fc07a77ce0faaacb1c140af7de38870d7da1. 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/BXIV82280068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd941fa2f329e3714a55b1a0cbe88f77f4251248369893394f2ffb8efb4e5d1. 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/BXIV82210449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364ec762300fb8e158abb520e68f77a88e99d8a403cb643e3fc5e0130d51d8d1. 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/BKGBP2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffa9460b675a6fc60183591284fbac81affaef46b2cf432ef8c51df7d38460f. 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/BXBOW2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9eb13a0e5050e3907570f416b9c356414acf7c1df1f71c7fb4e49de38eddef. 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/BX1KE2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a177437648cf6ca7010842bad39e6d52d9dddc7a82f2814cfe626fb3b9dd8df. 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/BX1KE2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d04bd0772cdd3a8ed06e61b01214ad447697a240e6b40e902787925fe6137. 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/BX1KE2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa83497f49d5f5fc0e50b3553957d14d23b82f033461637756e1432fa6bdc1. 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/BX1KE2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a61ba4ac8db28d8d0fb264a53298116d153331b0ff4698cba5f22b905d5dbdf. 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/BC6M22504419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7d5cff3c6af282a30eaed5ccc7f25b94f8599c186e30c022d32b4bd3873990. 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/BX1KE2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa517dedd14dad31961e4cab998ff3b873579dcf777fba6ebc7bf39b48e0f88a5. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/BX9HT2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529bcc3d3df4a2bfbf63f253d17c39ff7bd3c3e378ca5fcae7e5d2be42432d0c. 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/BR30B2100004.