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 0x07e1c3c6323fc96251c3433c8557b16c1d1714a3c77b3b831a21c12f8dd859fd. 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/56758775-3062-4b14-8616-8b75681ed355.json and https://artists.proofprofile.net/proofs/artist/56758775-3062-4b14-8616-8b75681ed355.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 0x3ba54b28d8f0d59a70d16d1f0b9a114a1b5724485ba1a6bdb3bfa65805210ebe. 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/BRTRB0400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d455ab6637c47116b9ca546178c6437712d5383e068e13cf4e7551e21a54f5d. 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/BRTRB0400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316704d285b179165e3c97f83afa6d84e7645647f4800ce654d99a12dba88ac9. 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/BRTRB0400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1da4d146955efca11e95438744b69936d96ce6ae5d7141d682ff7dd1b0008f. 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/BRTRB0400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c8081708383c90ae8f7beee1c9d611c461872d415b45ce1e25d9a35acb56e. 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/BRTRB0400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcff3f2a8d9e325a1b40366aec56bb4af08cbec0dd1a33124dc83d0da842ac. 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/BRTRB0400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d47419d37b6df4ea2789cdadc5db4cad40dd62943d80564c48bf6aa0cc673. 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/BRTRB0400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4463437803172ddfaba2c48fb1933c38c49762e4f5937ed0b80399db02660bce. 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/BRTRB0400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede1ce3d1fee10157599dba0bb113c62e93709247f8360b3e1c46abad5835f1. 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/BRTRB0400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc83aa89462eb24e90fe939e2c29e9950021d874b59f7ca8dbbe3f2f189dd96. 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/BRTRB0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c21fb20312bee92280758aa97c3f5dfd11005ef705e7a2d4e6633fcd56d4b4. 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/BRTRB0400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b3f55d4933f57ac2cc0d9cc5543e064f902dfa6fcf71a18a26815d22f6cd47. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/BRTRB0400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d99c610348dde95a5112811ac80860f3f674487cc11c607c4c3c119cdb809. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/BRGOA1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4b2a0277064ac2ddb381f14fc05587d9590b42227450e19a6894e0bff1c984. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRGOA1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfe2f95b82fc44e43d9e7192722e3a04c39c76f5ca2fcf50dc1c969e3ece19a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRGOA1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732c7399568d18b2d441bcf5c964f440179c0b2bb7043dd20533b3469bebc57. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRGOA1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d2bb16a4c5e10142bdbc0867e757937fda04b7c0dcf9b33f57bb349b827bf. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/BRGOA1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf9f66e0e0bdd2be0d551bb4cc8cc55e50deda487d5cb70d33e9bd36d424da. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BRGOA1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ddbf6da41e0c8c09ddfb3e023627d1ab6e1044548b60770723acdc7a6a69da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRGOA2000027.
Rational Culture - Corona Sessions Vol.4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c2f60011bc3ce4cbae20ac984f8e938330b58709fd369f28fb331d5d3e601. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BRGOA2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e96499627841eaa59b8838242f938e7bca60edf64213d96251406dc118cd2c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BRGOA2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89416a7ec74d118464deffb5a09279ecb9a1901c25d1bf3cacfa799d2e7773ed. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BRGOA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dac411b14c21ed8671d5bd5d0d554e1f1ff1f0ecd61e73791ee87c8be84dd05. 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/BRGOA2300016.