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 0xdb9fcf53b0eed2f89a4e12bb065cb784c8b37c78823732431df1e2eef2a66bf7. 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/b760f5f7-02da-4b85-94b6-dbb43c9c534c.json and https://artists.proofprofile.net/proofs/artist/b760f5f7-02da-4b85-94b6-dbb43c9c534c.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 0xb41a786cd039eeb8796ed91ebf04c139177bafc7d558ba8517c9440b69f03a1f. 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/GBKQU2523843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737ec102d3b96b167333d28ea2ea4fd01bb44354f495de54a5117426aa68149b. 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/GX8LE2572621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2b25b50de68f11eb9e8c34d3255f46546bdd633d20fa3bbf146150b37e39bb. 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/GBLV62420816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850528e4e4646ad15203801248ed1ca8168fe0bf737c80788e7079f0247cb94. 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/SE6SA2418205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1b66cb7e8acd0a18971baff45bfae41f678b199a8054514c712fd79868ceba. 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/GXBDS2483238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b76598af16319f486817901384f254c69dbe372723e380c350949b293fafb7. 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/DEH742427192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa264e9f114c648fc40ad269a28e6a1e490a8e6fa4d3fe70258b3a99eedee2a. 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/GBKQU2437486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00889015cbfb01b202b84d0645112b9c22338aa9eb053f9e4f4d41d3b1f2795d. 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/CH7812405016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb490c9ae4c6d63079c5acea74a70f90671b1ab0835d23565663da9ff77b595. 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/GBKQU2418582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77326bf730c8ca00a758024e5f19991bbd077aab0cfdc715c4d4ef53a4becf6b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKQU2418481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee8013570ac137aeb3220556b82e6558c5c928fccb5ab39e6c6bde7785b27f3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFP52327068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad170f6c4cb10635534c8a87a6a8550494c7758e6cdaa4da71619495fd8147b. 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/GX5MX2273945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810c520b27b7e03d86db28243854293af7c4c01d34b27dc7a47a60c424dc0e96. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZS632112366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae7bb764e65e087af6e42902fce2506523217122e48bd4c26f0922944b4baae. 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/GBKQU2182501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b71d751b9b3fd47e31ae4d1430597a8f2ffb4e070d6d48ceb6be55cd5cbfc9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZKDK2158792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0ead508c708e0440771d4ab2e2bb9d5daf664af6ea5da16999077ffc1a23b. 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/QZMHL2078576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9f9342a2298ef8cc8df5e17467883857c6eaf685316f6db9f721e29ef03ae2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/AUMEV2020314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2d9f1e2b737e2eff4512b6c5bc15f9fc33db62a94b7a888350cc2ae8e26323. 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/QZKDK2026176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5418af97849e735150c22564c865bf22f10b9c3dff9e7f009d8635328d62b4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QM42K2002449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf70f80f10a7f684337d578a277cd2c4fa7977443e498d81b93d3e08c4239ec2. 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/GBSMU6832448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f0e99119cceb7d39d1c66ec2681c6421eaa9c4d2196335a0c39d1c99463b81. 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/GBSMU6782400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75ef9499c89640ff8c52d4027d9028553619590317967b81307babab7f4359b. 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/GBSMU6590109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76216139e486e90b27883fe9277d2c17fd3c5f66fc6e578cc7b44a1faf60069. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLT2H2000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4213a6cfd114e4963a3376cddf65c36b143777c7963f8e2ffedbc9753b3febb. 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/NLT2H2000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86695ee006428ad3b4ccc6c07add99eb59c83ecad5821d66f85a39bc120600c3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLT2H2000252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d2332a82952b0bb710afad77c48ed80bc7880006b750dc774814858f83a37a. 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/QZFYY2123891.