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 0x72e92d1cedd31e264cd68101132aca040c589b6b0d46ac8d3a4d68ba29370385. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16b53f13-c372-4443-b123-24dc6b66398e.json and https://artists.proofprofile.net/proofs/artist/16b53f13-c372-4443-b123-24dc6b66398e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d7d5f3fe488059a2b5fe67676bbbcd40db8d623feca56a0c5b021032a8b93. 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/MXF152200616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da5337be247df31267f138663b6a463021c7a5665cd472578c72e81d2481977. 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/USUM72015123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc404cc8a481bc5723743ad9204261f39d7925b999ada97b922862e3d11a7a86. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5152100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c86ebf0d50aada65fb7144f3e6ad631df41140867dcb8fdc224a966e39670be. 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/MXF152400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd9afee6fb68805f9f2e979722b367abf6c6bad4b0844abe0a6ccb1a5093e29. 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/MXF152300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db0413a36abf76f84b19855d98f3899c38dafe670fac40e5f242cb7b489d87. 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/MXF152400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfab823db6d64dc03d977a66bac92e6b82468ba655b4f3ee649c650c3603d8c. 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/MXF152400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145bde0b2d0d8ea64ecfb094f4cec2031c96dc853a39f9e3d94245ac3a6a7cf2. 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/MXF152201111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ee9a6e6922fb4a3e354ba33e1c9c94b48ada1d3c8f09098f1ae0264c17a4c. 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/MXF152301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb41579710186e6b0043dcf6bb3e0609b33b2414db487dd4805c92513a60cff. 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/MXF152400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7035c80ce83ec107fb5b73294abda3ef2404ae2abcd8bd0e4470f6f97900b19c. 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/MXF152400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef04bf1c5daa29ab7f3467dc421fee6a0512caa756447fb2ba79ecff894f894. 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/MXF152400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ace99d35c3a2455c1e40fd0e8077ccf1f674911824b79d0b403635f78d8c41. 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/MXF152400456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94395f14acf24398dc15b830af63488d97df054d4f9d9a963f72badb23f25445. 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/MXF152400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb41579710186e6b0043dcf6bb3e0609b33b2414db487dd4805c92513a60cff. 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/MXF152400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d490586cafb174cf70362952f6a12f43895fa116ec2e10258a448c46d383fe. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/MXF152301683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ee9a6e6922fb4a3e354ba33e1c9c94b48ada1d3c8f09098f1ae0264c17a4c. 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/MXF152301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ee9a6e6922fb4a3e354ba33e1c9c94b48ada1d3c8f09098f1ae0264c17a4c. 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/MXF152301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd9afee6fb68805f9f2e979722b367abf6c6bad4b0844abe0a6ccb1a5093e29. 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/MXF152300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b056c8c1b5d84056d9d892adcd5f82d82af103d24a5cae042cb0b066a6f07. 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/ES5152300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fde5e2c9b9003e03389d782cf6913dccbed60398ed577fea98c69c1ba166fff. 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/MXF152201285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750edb22d12489170e9767c0efc052c80dee21c143f4a76071438052cb7c722c. 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/USWL12201168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb050871f87b39465c301d66e83c61c5258f3913f1a5d075b36617a1c6ebca9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHZ32043783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4911d5ef2e080d8d127ba083cd51fb8b812baafb8af8e71a80ac1d96a8b6a451. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHZ62009138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad94669cba4147d21a927dd59c453cfea8c8c2a083973b97ab262861c60b6c94. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USWL12100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff1a0af21cbbf5c89575104b5f0679efd54a452b985c7dc5ecfde7430587c3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXF152000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b188ab4db9c2a8627b6b3d3700f096e0af65365aa47c1e1c1a000ee23b907. 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/MXF152200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e41f178495ff79c61c9fab097aa201bfaf2eadc2a627e35a7409460d5bd1f. 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/MXF152200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b188ab4db9c2a8627b6b3d3700f096e0af65365aa47c1e1c1a000ee23b907. 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/MXF152200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad94669cba4147d21a927dd59c453cfea8c8c2a083973b97ab262861c60b6c94. 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/USWL12100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991deb690846f37887841c84bdf0a9552ce3701281453e4efc6d08a501b1507. 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/MXF012100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff1a0af21cbbf5c89575104b5f0679efd54a452b985c7dc5ecfde7430587c3. 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/MXF152000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4911d5ef2e080d8d127ba083cd51fb8b812baafb8af8e71a80ac1d96a8b6a451. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHZ62009138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb050871f87b39465c301d66e83c61c5258f3913f1a5d075b36617a1c6ebca9. 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/QZHZ32043783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51706ba3ccd4099d94b22408d7953486e2e2368d384303eb33750ed8ca80e888. 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/QZGLS1961796.