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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0138eab05a64f4bcc2f98c7e9fd2c400e893beafda51d88749bdc1a098a5491c. 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/a4e722d5-712d-439a-bc44-763625d82ee3.json and https://artists.proofprofile.net/proofs/artist/a4e722d5-712d-439a-bc44-763625d82ee3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Би-2 & Prague Metropolitan Symphonic Orchestra Vol. 2
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d301f1286181cb4227e00be6502c8d2f775d2b2bd273245ad249e1f85fa934c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW1798299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8107db475143967a7507ecf4abaf47cd0bb39e16c0e2ceb1f8a67691ff19003e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM4TW1798301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8a20e4f5b3039f715a81c9d806eba4a84d2892ac74e34b5f43f27be324590. 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/QM4TW1798304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cce6031df2d0370e7a568220db85e9b0d3744509ef3183251483b30514b5664. 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/QM4TW1798305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3619223aebb68c51c2a6b7ca1edf759661c57158f97ecd98c8016099ee26a2. 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/QM4TW1798310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c48fb5b92364f1919a3165149eec59742290d24aa9d6998281d2f01c1a989c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TW1798300.
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 0x578c6dad0028568066d7cfa3354a8431c05b52afbb1debc259aefd83b95bcd46. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TW1798302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4dd7112b42cd0836833bdf221bdf8a6310a8fea401b804aaa6929a7726d40. 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/QM4TW1798303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344cbe51882e16780c861aa8fd84cc8e340cc883892e06386ee844613fc24e1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW1798306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32672afbf2960f96b3a43a8175cbc4bfcbfaf05f1f201aebf38bab8a4a2e44ec. 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/QM4TW1798307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c3ef4cb6396ac1430d2991b3c081a9fc65fafd0611d60cf4a2cb77498d24ec. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW1798309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d49474c2f49a2e9a878ba055d5072705cff24c77829ee41d2fb867c8ab2c0a. 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/RUA742213501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe86da17e46eab935fe34a216c857363812bffd042c0f88775a0c115f3645c. 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/RUA742213502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4657e3a43dd77a0fd4ecdce2882ffe961f178d06d19ac16386821634f92aa6. 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/RUA742213503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a2b03dea2f77c44852cce9165ba5585a5deff171d8f16e4766ec20da6e77e4. 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/RUA742213504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18084a963d273185faf0af8945369f7c4b0bc5bc5e07eea4cfd2117863b4923. 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/RUA742213505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987e00d66eebc9760661113b69e1774895802f23e8f03db1a3062d2f0d3d325. 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/RUA742213506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa763da345695cb4276351d794f3fb908d8e5c8301217b867e97c8dec20629c. 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/RUA742213507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe744ef5c6ba409e988a6ec6a2a2f205124e1fee9900c8dcb23887b2bfd18c1af. 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/RUA742213508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e01d6b6d5077066f27cc1dea37417b78f6726dbc166ee6f77f240a193a35e2. 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/RUA742213509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a713fe4fba31ccaa75c08b0b25fc1c4172ff3f34e5dc7ad47fcd6f5f7bd9453. 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/RUA742213510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f6366f268d60953e8a88b2f22154a53acfd2bc99e13540fade32003597d9a5. 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/RUA742213511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd82f620c0586a9fd81475345fb227b37eb69954774593083b952c66c1c5cec8. 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/RUA742213512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7933fc0124fa195f8aaa9a2b3d6db3d5636a219517cd784a135a46d9135a01. 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/RUA742213513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd8d3c2fb6d640ce74e4b2cb2ab35b3dc6033491cda043919806b9f8ae80134. 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/RUA742213514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b866b8ddaf7340c02daa4473e3e1a2e74173af448b4685a0e09c8bb6bfda79b. 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/RUA742213516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9f09e7b3c22182fc38634ede553471e89f69fa3d191e8ac4d815c255669f11. 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/USV351406524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dae8c5031f4f93f02307b918c742634f69ec18e1a9f7b89325090ac23e4b49. 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/QMFMF1480360.